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usn-4756-1
Vulnerability from osv_ubuntu
Published
2021-02-26 18:11
Modified
2026-04-22 07:36
Summary
firefox vulnerabilities
Details
Multiple security issues were discovered in Firefox. If a user were tricked into opening a specially crafted website, an attacker could potentially exploit these to cause a denial of service, obtain sensitive information, conduct cross-site scripting (XSS) attacks, bypass HTTP auth phishing warnings, or execute arbitrary code.
References
{
"affected": [
{
"database_specific": {
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{
"id": "CVE-2021-23968",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N",
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{
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}
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},
{
"id": "CVE-2021-23969",
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{
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{
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]
},
{
"id": "CVE-2021-23970",
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{
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},
{
"id": "CVE-2021-23971",
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{
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{
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{
"id": "CVE-2021-23979",
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{
"id": "CVE-2021-23979",
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"type": "CVSS_V3"
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}
]
}
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}
},
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"binaries": [
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},
{
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},
{
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}
]
},
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{
"score": "medium",
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},
{
"id": "CVE-2021-23969",
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"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N",
"type": "CVSS_V3"
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{
"id": "CVE-2021-23970",
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{
"id": "CVE-2021-23971",
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{
"id": "CVE-2021-23974",
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"score": "medium",
"type": "Ubuntu"
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{
"id": "CVE-2021-23975",
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]
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}
],
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}
],
"versions": [
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]
}
],
"aliases": [],
"details": "Multiple security issues were discovered in Firefox. If a user were\ntricked into opening a specially crafted website, an attacker could\npotentially exploit these to cause a denial of service, obtain sensitive\ninformation, conduct cross-site scripting (XSS) attacks, bypass HTTP auth\nphishing warnings, or execute arbitrary code.\n",
"id": "USN-4756-1",
"modified": "2026-04-22T07:36:59Z",
"published": "2021-02-26T18:11:10Z",
"references": [
{
"type": "ADVISORY",
"url": "https://ubuntu.com/security/notices/USN-4756-1"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2021-23968"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2021-23969"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2021-23970"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2021-23971"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2021-23972"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2021-23973"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2021-23974"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2021-23975"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2021-23978"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2021-23979"
}
],
"related": [],
"schema_version": "1.7.0",
"summary": "firefox vulnerabilities",
"upstream": [
"UBUNTU-CVE-2021-23968",
"UBUNTU-CVE-2021-23969",
"UBUNTU-CVE-2021-23970",
"UBUNTU-CVE-2021-23971",
"UBUNTU-CVE-2021-23972",
"UBUNTU-CVE-2021-23973",
"UBUNTU-CVE-2021-23974",
"UBUNTU-CVE-2021-23975",
"UBUNTU-CVE-2021-23978",
"UBUNTU-CVE-2021-23979"
]
}
ubuntu-cve-2021-23968
Vulnerability from osv_ubuntu
Published
2021-02-26 02:15
Modified
2026-04-22 07:39
Summary
Details
If Content Security Policy blocked frame navigation, the full destination of a redirect served in the frame was reported in the violation report; as opposed to the original frame URI. This could be used to leak sensitive information contained in such URIs. This vulnerability affects Firefox < 86, Thunderbird < 78.8, and Firefox ESR < 78.8.
Severity
4.3 (Medium)
N/A (UNKNOWN)
References
| URL | Type | ||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
|||||||||||||||||||||||||||||||||||
{
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},
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]
},
"package": {
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"name": "mozjs78",
"purl": "pkg:deb/ubuntu/mozjs78@78.15.0-4ubuntu1?arch=source\u0026distro=jammy"
},
"ranges": [
{
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{
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],
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}
],
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}
],
"aliases": [],
"details": "If Content Security Policy blocked frame navigation, the full destination of a redirect served in the frame was reported in the violation report; as opposed to the original frame URI. This could be used to leak sensitive information contained in such URIs. This vulnerability affects Firefox \u003c 86, Thunderbird \u003c 78.8, and Firefox ESR \u003c 78.8.",
"id": "UBUNTU-CVE-2021-23968",
"modified": "2026-04-22T07:39:56Z",
"published": "2021-02-26T02:15:00Z",
"references": [
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2021-23968"
},
{
"type": "REPORT",
"url": "https://www.mozilla.org/en-US/security/advisories/mfsa2021-07/#CVE-2021-23968"
},
{
"type": "REPORT",
"url": "https://www.mozilla.org/en-US/security/advisories/mfsa2021-08/#CVE-2021-23968"
},
{
"type": "REPORT",
"url": "https://www.mozilla.org/en-US/security/advisories/mfsa2021-09/#CVE-2021-23968"
},
{
"type": "REPORT",
"url": "https://bugzilla.mozilla.org/show_bug.cgi?id=1687342"
},
{
"type": "REPORT",
"url": "https://www.mozilla.org/security/advisories/mfsa2021-07/"
},
{
"type": "REPORT",
"url": "https://www.mozilla.org/security/advisories/mfsa2021-08/"
},
{
"type": "REPORT",
"url": "https://www.mozilla.org/security/advisories/mfsa2021-09/"
},
{
"type": "ADVISORY",
"url": "https://ubuntu.com/security/notices/USN-4756-1"
},
{
"type": "ADVISORY",
"url": "https://ubuntu.com/security/notices/USN-4936-1"
},
{
"type": "REPORT",
"url": "https://www.cve.org/CVERecord?id=CVE-2021-23968"
}
],
"related": [
"USN-4756-1",
"USN-4936-1"
],
"schema_version": "1.7.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
],
"upstream": [
"CVE-2021-23968"
]
}
ubuntu-cve-2021-23969
Vulnerability from osv_ubuntu
Published
2021-02-26 02:15
Modified
2026-04-22 07:39
Summary
Details
As specified in the W3C Content Security Policy draft, when creating a violation report, "User agents need to ensure that the source file is the URL requested by the page, pre-redirects. If that’s not possible, user agents need to strip the URL down to an origin to avoid unintentional leakage." Under certain types of redirects, Firefox incorrectly set the source file to be the destination of the redirects. This was fixed to be the redirect destination's origin. This vulnerability affects Firefox < 86, Thunderbird < 78.8, and Firefox ESR < 78.8.
Severity
4.3 (Medium)
N/A (UNKNOWN)
References
| URL | Type | ||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
|||||||||||||||||||||||||||||||||||
{
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"type": "ECOSYSTEM"
}
],
"versions": [
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},
{
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{
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}
]
},
"package": {
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"name": "mozjs38",
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},
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{
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],
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],
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]
},
{
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{
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{
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},
{
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}
]
},
"package": {
"ecosystem": "Ubuntu:20.04:LTS",
"name": "firefox",
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},
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},
{
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},
{
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{
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{
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},
{
"binary_name": "xul-ext-lightning",
"binary_version": "1:78.8.1+build1-0ubuntu0.20.04.1"
}
]
},
"package": {
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"name": "thunderbird",
"purl": "pkg:deb/ubuntu/thunderbird@1:78.8.1+build1-0ubuntu0.20.04.1?arch=source\u0026distro=focal"
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{
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{
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}
],
"versions": [
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},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libmozjs-68-0",
"binary_version": "68.6.0-1ubuntu1"
}
]
},
"package": {
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"name": "mozjs68",
"purl": "pkg:deb/ubuntu/mozjs68@68.6.0-1ubuntu1?arch=source\u0026distro=focal"
},
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{
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{
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}
],
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],
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},
{
"ecosystem_specific": {
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"binary_version": "52.9.1-1ubuntu3"
}
]
},
"package": {
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"name": "mozjs52",
"purl": "pkg:deb/ubuntu/mozjs52@52.9.1-1ubuntu3?arch=source\u0026distro=focal"
},
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{
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{
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}
],
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}
],
"versions": [
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]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libmozjs-78-0",
"binary_version": "78.15.0-4ubuntu1"
}
]
},
"package": {
"ecosystem": "Ubuntu:22.04:LTS",
"name": "mozjs78",
"purl": "pkg:deb/ubuntu/mozjs78@78.15.0-4ubuntu1?arch=source\u0026distro=jammy"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"78.13.0-1",
"78.15.0-2",
"78.15.0-4ubuntu1"
]
}
],
"aliases": [],
"details": "As specified in the W3C Content Security Policy draft, when creating a violation report, \"User agents need to ensure that the source file is the URL requested by the page, pre-redirects. If that\u2019s not possible, user agents need to strip the URL down to an origin to avoid unintentional leakage.\" Under certain types of redirects, Firefox incorrectly set the source file to be the destination of the redirects. This was fixed to be the redirect destination\u0027s origin. This vulnerability affects Firefox \u003c 86, Thunderbird \u003c 78.8, and Firefox ESR \u003c 78.8.",
"id": "UBUNTU-CVE-2021-23969",
"modified": "2026-04-22T07:39:56Z",
"published": "2021-02-26T02:15:00Z",
"references": [
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2021-23969"
},
{
"type": "REPORT",
"url": "https://www.mozilla.org/en-US/security/advisories/mfsa2021-07/#CVE-2021-23969"
},
{
"type": "REPORT",
"url": "https://www.mozilla.org/en-US/security/advisories/mfsa2021-08/#CVE-2021-23969"
},
{
"type": "REPORT",
"url": "https://www.mozilla.org/en-US/security/advisories/mfsa2021-09/#CVE-2021-23969"
},
{
"type": "REPORT",
"url": "https://bugzilla.mozilla.org/show_bug.cgi?id=1542194"
},
{
"type": "REPORT",
"url": "https://www.mozilla.org/security/advisories/mfsa2021-07/"
},
{
"type": "REPORT",
"url": "https://www.mozilla.org/security/advisories/mfsa2021-08/"
},
{
"type": "REPORT",
"url": "https://www.mozilla.org/security/advisories/mfsa2021-09/"
},
{
"type": "ADVISORY",
"url": "https://ubuntu.com/security/notices/USN-4756-1"
},
{
"type": "ADVISORY",
"url": "https://ubuntu.com/security/notices/USN-4936-1"
},
{
"type": "REPORT",
"url": "https://www.cve.org/CVERecord?id=CVE-2021-23969"
}
],
"related": [
"USN-4756-1",
"USN-4936-1"
],
"schema_version": "1.7.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
],
"upstream": [
"CVE-2021-23969"
]
}
ubuntu-cve-2021-23970
Vulnerability from osv_ubuntu
Published
2021-02-26 02:15
Modified
2026-04-22 07:39
Summary
Details
Context-specific code was included in a shared jump table; resulting in assertions being triggered in multithreaded wasm code. This vulnerability affects Firefox < 86.
Severity
6.5 (Medium)
N/A (UNKNOWN)
References
| URL | Type | |||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
||||||||||||||||||||
{
"affected": [
{
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"availability": "No subscription required",
"binaries": [
{
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"binary_version": "86.0+build3-0ubuntu0.16.04.1"
},
{
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"binary_version": "86.0+build3-0ubuntu0.16.04.1"
},
{
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}
]
},
"package": {
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},
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{
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},
{
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{
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]
},
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},
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}
]
},
"package": {
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},
"package": {
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"name": "mozjs78",
"purl": "pkg:deb/ubuntu/mozjs78@78.15.0-4ubuntu1?arch=source\u0026distro=jammy"
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],
"aliases": [],
"details": "Context-specific code was included in a shared jump table; resulting in assertions being triggered in multithreaded wasm code. This vulnerability affects Firefox \u003c 86.",
"id": "UBUNTU-CVE-2021-23970",
"modified": "2026-04-22T07:39:56Z",
"published": "2021-02-26T02:15:00Z",
"references": [
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2021-23970"
},
{
"type": "REPORT",
"url": "https://www.mozilla.org/en-US/security/advisories/mfsa2021-07/#CVE-2021-23970"
},
{
"type": "REPORT",
"url": "https://bugzilla.mozilla.org/show_bug.cgi?id=1681724"
},
{
"type": "REPORT",
"url": "https://www.mozilla.org/security/advisories/mfsa2021-07/"
},
{
"type": "ADVISORY",
"url": "https://ubuntu.com/security/notices/USN-4756-1"
},
{
"type": "REPORT",
"url": "https://www.cve.org/CVERecord?id=CVE-2021-23970"
}
],
"related": [
"USN-4756-1"
],
"schema_version": "1.7.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
],
"upstream": [
"CVE-2021-23970"
]
}
ubuntu-cve-2021-23971
Vulnerability from osv_ubuntu
Published
2021-02-26 02:15
Modified
2026-04-22 07:39
Summary
Details
When processing a redirect with a conflicting Referrer-Policy, Firefox would have adopted the redirect's Referrer-Policy. This would have potentially resulted in more information than intended by the original origin being provided to the destination of the redirect. This vulnerability affects Firefox < 86.
Severity
6.5 (Medium)
N/A (UNKNOWN)
References
| URL | Type | |||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
||||||||||||||||||||
{
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"package": {
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"name": "mozjs78",
"purl": "pkg:deb/ubuntu/mozjs78@78.15.0-4ubuntu1?arch=source\u0026distro=jammy"
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"aliases": [],
"details": "When processing a redirect with a conflicting Referrer-Policy, Firefox would have adopted the redirect\u0027s Referrer-Policy. This would have potentially resulted in more information than intended by the original origin being provided to the destination of the redirect. This vulnerability affects Firefox \u003c 86.",
"id": "UBUNTU-CVE-2021-23971",
"modified": "2026-04-22T07:39:56Z",
"published": "2021-02-26T02:15:00Z",
"references": [
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2021-23971"
},
{
"type": "REPORT",
"url": "https://www.mozilla.org/en-US/security/advisories/mfsa2021-07/#CVE-2021-23971"
},
{
"type": "REPORT",
"url": "https://bugzilla.mozilla.org/show_bug.cgi?id=1678545"
},
{
"type": "REPORT",
"url": "https://www.mozilla.org/security/advisories/mfsa2021-07/"
},
{
"type": "ADVISORY",
"url": "https://ubuntu.com/security/notices/USN-4756-1"
},
{
"type": "REPORT",
"url": "https://www.cve.org/CVERecord?id=CVE-2021-23971"
}
],
"related": [
"USN-4756-1"
],
"schema_version": "1.7.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
],
"upstream": [
"CVE-2021-23971"
]
}
ubuntu-cve-2021-23972
Vulnerability from osv_ubuntu
Published
2021-02-26 02:15
Modified
2026-04-22 07:39
Summary
Details
One phishing tactic on the web is to provide a link with HTTP Auth. For example 'https://www.phishingtarget.com@evil.com'. To mitigate this type of attack, Firefox will display a warning dialog; however, this warning dialog would not have been displayed if evil.com used a redirect that was cached by the browser. This vulnerability affects Firefox < 86.
Severity
8.8 (High)
N/A (UNKNOWN)
References
| URL | Type | |||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
||||||||||||||||||||
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"ecosystem": "Ubuntu:22.04:LTS",
"name": "mozjs78",
"purl": "pkg:deb/ubuntu/mozjs78@78.15.0-4ubuntu1?arch=source\u0026distro=jammy"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"78.13.0-1",
"78.15.0-2",
"78.15.0-4ubuntu1"
]
}
],
"aliases": [],
"details": "One phishing tactic on the web is to provide a link with HTTP Auth. For example \u0027https://www.phishingtarget.com@evil.com\u0027. To mitigate this type of attack, Firefox will display a warning dialog; however, this warning dialog would not have been displayed if evil.com used a redirect that was cached by the browser. This vulnerability affects Firefox \u003c 86.",
"id": "UBUNTU-CVE-2021-23972",
"modified": "2026-04-22T07:39:56Z",
"published": "2021-02-26T02:15:00Z",
"references": [
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2021-23972"
},
{
"type": "REPORT",
"url": "https://www.mozilla.org/en-US/security/advisories/mfsa2021-07/#CVE-2021-23972"
},
{
"type": "REPORT",
"url": "https://bugzilla.mozilla.org/show_bug.cgi?id=1683536"
},
{
"type": "REPORT",
"url": "https://www.mozilla.org/security/advisories/mfsa2021-07/"
},
{
"type": "ADVISORY",
"url": "https://ubuntu.com/security/notices/USN-4756-1"
},
{
"type": "REPORT",
"url": "https://www.cve.org/CVERecord?id=CVE-2021-23972"
}
],
"related": [
"USN-4756-1"
],
"schema_version": "1.7.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "low",
"type": "Ubuntu"
}
],
"upstream": [
"CVE-2021-23972"
]
}
ubuntu-cve-2021-23973
Vulnerability from osv_ubuntu
Published
2021-02-26 02:15
Modified
2026-04-22 07:39
Summary
Details
When trying to load a cross-origin resource in an audio/video context a decoding error may have resulted, and the content of that error may have revealed information about the resource. This vulnerability affects Firefox < 86, Thunderbird < 78.8, and Firefox ESR < 78.8.
Severity
6.5 (Medium)
N/A (UNKNOWN)
References
| URL | Type | ||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
|||||||||||||||||||||||||||||||||||
{
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{
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"availability": "No subscription required",
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{
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},
{
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},
{
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}
]
},
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},
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]
},
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"name": "mozjs68",
"purl": "pkg:deb/ubuntu/mozjs68@68.6.0-1ubuntu1?arch=source\u0026distro=focal"
},
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{
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"name": "mozjs52",
"purl": "pkg:deb/ubuntu/mozjs52@52.9.1-1ubuntu3?arch=source\u0026distro=focal"
},
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{
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],
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],
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]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libmozjs-78-0",
"binary_version": "78.15.0-4ubuntu1"
}
]
},
"package": {
"ecosystem": "Ubuntu:22.04:LTS",
"name": "mozjs78",
"purl": "pkg:deb/ubuntu/mozjs78@78.15.0-4ubuntu1?arch=source\u0026distro=jammy"
},
"ranges": [
{
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{
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],
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"78.13.0-1",
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}
],
"aliases": [],
"details": "When trying to load a cross-origin resource in an audio/video context a decoding error may have resulted, and the content of that error may have revealed information about the resource. This vulnerability affects Firefox \u003c 86, Thunderbird \u003c 78.8, and Firefox ESR \u003c 78.8.",
"id": "UBUNTU-CVE-2021-23973",
"modified": "2026-04-22T07:39:56Z",
"published": "2021-02-26T02:15:00Z",
"references": [
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2021-23973"
},
{
"type": "REPORT",
"url": "https://www.mozilla.org/en-US/security/advisories/mfsa2021-07/#CVE-2021-23973"
},
{
"type": "REPORT",
"url": "https://www.mozilla.org/en-US/security/advisories/mfsa2021-08/#CVE-2021-23973"
},
{
"type": "REPORT",
"url": "https://www.mozilla.org/en-US/security/advisories/mfsa2021-09/#CVE-2021-23973"
},
{
"type": "REPORT",
"url": "https://bugzilla.mozilla.org/show_bug.cgi?id=1690976"
},
{
"type": "REPORT",
"url": "https://www.mozilla.org/security/advisories/mfsa2021-07/"
},
{
"type": "REPORT",
"url": "https://www.mozilla.org/security/advisories/mfsa2021-08/"
},
{
"type": "REPORT",
"url": "https://www.mozilla.org/security/advisories/mfsa2021-09/"
},
{
"type": "ADVISORY",
"url": "https://ubuntu.com/security/notices/USN-4756-1"
},
{
"type": "ADVISORY",
"url": "https://ubuntu.com/security/notices/USN-4936-1"
},
{
"type": "REPORT",
"url": "https://www.cve.org/CVERecord?id=CVE-2021-23973"
}
],
"related": [
"USN-4756-1",
"USN-4936-1"
],
"schema_version": "1.7.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N",
"type": "CVSS_V3"
},
{
"score": "low",
"type": "Ubuntu"
}
],
"upstream": [
"CVE-2021-23973"
]
}
ubuntu-cve-2021-23974
Vulnerability from osv_ubuntu
Published
2021-02-26 02:15
Modified
2026-04-22 07:39
Summary
Details
The DOMParser API did not properly process '' elements for escaping. This could be used as an mXSS vector to bypass an HTML Sanitizer. This vulnerability affects Firefox < 86.
Severity
6.1 (Medium)
N/A (UNKNOWN)
References
| URL | Type | |||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
||||||||||||||||||||
{
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"binaries": [
{
"binary_name": "libmozjs-78-0",
"binary_version": "78.15.0-4ubuntu1"
}
]
},
"package": {
"ecosystem": "Ubuntu:22.04:LTS",
"name": "mozjs78",
"purl": "pkg:deb/ubuntu/mozjs78@78.15.0-4ubuntu1?arch=source\u0026distro=jammy"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"78.13.0-1",
"78.15.0-2",
"78.15.0-4ubuntu1"
]
}
],
"aliases": [],
"details": "The DOMParser API did not properly process \u0027\u003cnoscript\u003e\u0027 elements for escaping. This could be used as an mXSS vector to bypass an HTML Sanitizer. This vulnerability affects Firefox \u003c 86.",
"id": "UBUNTU-CVE-2021-23974",
"modified": "2026-04-22T07:39:56Z",
"published": "2021-02-26T02:15:00Z",
"references": [
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2021-23974"
},
{
"type": "REPORT",
"url": "https://www.mozilla.org/en-US/security/advisories/mfsa2021-07/#CVE-2021-23974"
},
{
"type": "REPORT",
"url": "https://bugzilla.mozilla.org/buglist.cgi?bug_id=1528997%2C1683627"
},
{
"type": "REPORT",
"url": "https://www.mozilla.org/security/advisories/mfsa2021-07/"
},
{
"type": "ADVISORY",
"url": "https://ubuntu.com/security/notices/USN-4756-1"
},
{
"type": "REPORT",
"url": "https://www.cve.org/CVERecord?id=CVE-2021-23974"
}
],
"related": [
"USN-4756-1"
],
"schema_version": "1.7.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
],
"upstream": [
"CVE-2021-23974"
]
}
ubuntu-cve-2021-23975
Vulnerability from osv_ubuntu
Published
2021-02-26 02:15
Modified
2026-04-22 07:39
Summary
Details
The developer page about:memory has a Measure function for exploring what object types the browser has allocated and their sizes. When this function was invoked we incorrectly called the sizeof function, instead of using the API method that checks for invalid pointers. This vulnerability affects Firefox < 86.
Severity
6.5 (Medium)
N/A (UNKNOWN)
References
| URL | Type | |||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
||||||||||||||||||||
{
"affected": [
{
"ecosystem_specific": {
"availability": "No subscription required",
"binaries": [
{
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"binary_version": "86.0+build3-0ubuntu0.16.04.1"
},
{
"binary_name": "firefox-geckodriver",
"binary_version": "86.0+build3-0ubuntu0.16.04.1"
},
{
"binary_name": "firefox-mozsymbols",
"binary_version": "86.0+build3-0ubuntu0.16.04.1"
}
]
},
"package": {
"ecosystem": "Ubuntu:16.04:LTS",
"name": "firefox",
"purl": "pkg:deb/ubuntu/firefox@86.0+build3-0ubuntu0.16.04.1?arch=source\u0026distro=xenial"
},
"ranges": [
{
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{
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},
{
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}
],
"type": "ECOSYSTEM"
}
],
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"85.0+build1-0ubuntu0.16.04.1",
"85.0.1+build1-0ubuntu0.16.04.1"
]
},
{
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"availability": "No subscription required",
"binaries": [
{
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"binary_version": "86.0+build3-0ubuntu0.18.04.1"
},
{
"binary_name": "firefox-geckodriver",
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},
{
"binary_name": "firefox-mozsymbols",
"binary_version": "86.0+build3-0ubuntu0.18.04.1"
}
]
},
"package": {
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"name": "firefox",
"purl": "pkg:deb/ubuntu/firefox@86.0+build3-0ubuntu0.18.04.1?arch=source\u0026distro=bionic"
},
"ranges": [
{
"events": [
{
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},
{
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}
],
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}
],
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]
},
{
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{
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}
]
},
"package": {
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"name": "mozjs52",
"purl": "pkg:deb/ubuntu/mozjs52@52.9.1-0ubuntu0.18.04.1?arch=source\u0026distro=bionic"
},
"ranges": [
{
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}
],
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}
],
"versions": [
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"52.3.1-7fakesync1",
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]
},
{
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"binaries": [
{
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"binary_version": "38.8.0~repack1-0ubuntu4"
}
]
},
"package": {
"ecosystem": "Ubuntu:18.04:LTS",
"name": "mozjs38",
"purl": "pkg:deb/ubuntu/mozjs38@38.8.0~repack1-0ubuntu4?arch=source\u0026distro=bionic"
},
"ranges": [
{
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}
],
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}
],
"versions": [
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]
},
{
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"availability": "No subscription required",
"binaries": [
{
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"binary_version": "86.0+build3-0ubuntu0.20.04.1"
},
{
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"binary_version": "86.0+build3-0ubuntu0.20.04.1"
},
{
"binary_name": "firefox-mozsymbols",
"binary_version": "86.0+build3-0ubuntu0.20.04.1"
}
]
},
"package": {
"ecosystem": "Ubuntu:20.04:LTS",
"name": "firefox",
"purl": "pkg:deb/ubuntu/firefox@86.0+build3-0ubuntu0.20.04.1?arch=source\u0026distro=focal"
},
"ranges": [
{
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},
{
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}
],
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}
],
"versions": [
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},
{
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{
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}
]
},
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"name": "mozjs68",
"purl": "pkg:deb/ubuntu/mozjs68@68.6.0-1ubuntu1?arch=source\u0026distro=focal"
},
"ranges": [
{
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}
],
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}
],
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"68.5.0-2~fakesync",
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"68.6.0-1ubuntu1"
]
},
{
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}
]
},
"package": {
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"name": "mozjs52",
"purl": "pkg:deb/ubuntu/mozjs52@52.9.1-1ubuntu3?arch=source\u0026distro=focal"
},
"ranges": [
{
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}
],
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}
],
"versions": [
"52.9.1-1build1",
"52.9.1-1ubuntu3"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libmozjs-78-0",
"binary_version": "78.15.0-4ubuntu1"
}
]
},
"package": {
"ecosystem": "Ubuntu:22.04:LTS",
"name": "mozjs78",
"purl": "pkg:deb/ubuntu/mozjs78@78.15.0-4ubuntu1?arch=source\u0026distro=jammy"
},
"ranges": [
{
"events": [
{
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}
],
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}
],
"versions": [
"78.13.0-1",
"78.15.0-2",
"78.15.0-4ubuntu1"
]
}
],
"aliases": [],
"details": "The developer page about:memory has a Measure function for exploring what object types the browser has allocated and their sizes. When this function was invoked we incorrectly called the sizeof function, instead of using the API method that checks for invalid pointers. This vulnerability affects Firefox \u003c 86.",
"id": "UBUNTU-CVE-2021-23975",
"modified": "2026-04-22T07:39:56Z",
"published": "2021-02-26T02:15:00Z",
"references": [
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2021-23975"
},
{
"type": "REPORT",
"url": "https://www.mozilla.org/en-US/security/advisories/mfsa2021-07/#CVE-2021-23975"
},
{
"type": "REPORT",
"url": "https://bugzilla.mozilla.org/show_bug.cgi?id=1685145"
},
{
"type": "REPORT",
"url": "https://www.mozilla.org/security/advisories/mfsa2021-07/"
},
{
"type": "ADVISORY",
"url": "https://ubuntu.com/security/notices/USN-4756-1"
},
{
"type": "REPORT",
"url": "https://www.cve.org/CVERecord?id=CVE-2021-23975"
}
],
"related": [
"USN-4756-1"
],
"schema_version": "1.7.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N",
"type": "CVSS_V3"
},
{
"score": "low",
"type": "Ubuntu"
}
],
"upstream": [
"CVE-2021-23975"
]
}
ubuntu-cve-2021-23978
Vulnerability from osv_ubuntu
Published
2021-02-26 16:15
Modified
2026-04-22 07:39
Summary
Details
Mozilla developers reported memory safety bugs present in Firefox 85 and Firefox ESR 78.7. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability affects Firefox < 86, Thunderbird < 78.8, and Firefox ESR < 78.8.
Severity
8.8 (High)
N/A (UNKNOWN)
References
| URL | Type | ||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
|||||||||||||||||||||||||||||||||||
{
"affected": [
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"aliases": [],
"details": "Mozilla developers reported memory safety bugs present in Firefox 85 and Firefox ESR 78.7. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability affects Firefox \u003c 86, Thunderbird \u003c 78.8, and Firefox ESR \u003c 78.8.",
"id": "UBUNTU-CVE-2021-23978",
"modified": "2026-04-22T07:39:56Z",
"published": "2021-02-26T16:15:00Z",
"references": [
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2021-23978"
},
{
"type": "REPORT",
"url": "https://www.mozilla.org/en-US/security/advisories/mfsa2021-07/#CVE-2021-23978"
},
{
"type": "REPORT",
"url": "https://www.mozilla.org/en-US/security/advisories/mfsa2021-08/#CVE-2021-23978"
},
{
"type": "REPORT",
"url": "https://www.mozilla.org/en-US/security/advisories/mfsa2021-09/#CVE-2021-23978"
},
{
"type": "REPORT",
"url": "https://bugzilla.mozilla.org/buglist.cgi?bug_id=786797%2C1682928%2C1687391%2C1687597"
},
{
"type": "REPORT",
"url": "https://www.mozilla.org/security/advisories/mfsa2021-07/"
},
{
"type": "REPORT",
"url": "https://www.mozilla.org/security/advisories/mfsa2021-08/"
},
{
"type": "REPORT",
"url": "https://www.mozilla.org/security/advisories/mfsa2021-09/"
},
{
"type": "ADVISORY",
"url": "https://ubuntu.com/security/notices/USN-4756-1"
},
{
"type": "ADVISORY",
"url": "https://ubuntu.com/security/notices/USN-4936-1"
},
{
"type": "REPORT",
"url": "https://www.cve.org/CVERecord?id=CVE-2021-23978"
}
],
"related": [
"USN-4756-1",
"USN-4936-1"
],
"schema_version": "1.7.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
],
"upstream": [
"CVE-2021-23978"
]
}
ubuntu-cve-2021-23979
Vulnerability from osv_ubuntu
Published
2021-02-26 16:15
Modified
2026-04-22 07:39
Summary
Details
Mozilla developers reported memory safety bugs present in Firefox 85. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability affects Firefox < 86.
Severity
8.8 (High)
N/A (UNKNOWN)
References
| URL | Type | |||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
||||||||||||||||||||
{
"affected": [
{
"ecosystem_specific": {
"availability": "No subscription required",
"binaries": [
{
"binary_name": "firefox",
"binary_version": "86.0+build3-0ubuntu0.16.04.1"
},
{
"binary_name": "firefox-geckodriver",
"binary_version": "86.0+build3-0ubuntu0.16.04.1"
},
{
"binary_name": "firefox-mozsymbols",
"binary_version": "86.0+build3-0ubuntu0.16.04.1"
}
]
},
"package": {
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"name": "firefox",
"purl": "pkg:deb/ubuntu/firefox@86.0+build3-0ubuntu0.16.04.1?arch=source\u0026distro=xenial"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
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}
],
"type": "ECOSYSTEM"
}
],
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]
},
{
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"availability": "No subscription required",
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},
{
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},
{
"binary_name": "firefox-mozsymbols",
"binary_version": "86.0+build3-0ubuntu0.18.04.1"
}
]
},
"package": {
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"name": "firefox",
"purl": "pkg:deb/ubuntu/firefox@86.0+build3-0ubuntu0.18.04.1?arch=source\u0026distro=bionic"
},
"ranges": [
{
"events": [
{
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},
{
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}
],
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}
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},
{
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}
]
},
"package": {
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"name": "mozjs52",
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},
"ranges": [
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}
],
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}
],
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]
},
{
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}
]
},
"package": {
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},
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}
],
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}
],
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]
},
{
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"availability": "No subscription required",
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{
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},
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},
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}
]
},
"package": {
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},
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},
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}
],
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}
],
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]
},
{
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{
"binary_name": "libmozjs-78-0",
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}
]
},
"package": {
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"name": "mozjs78",
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]
}
],
"aliases": [],
"details": "Mozilla developers reported memory safety bugs present in Firefox 85. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability affects Firefox \u003c 86.",
"id": "UBUNTU-CVE-2021-23979",
"modified": "2026-04-22T07:39:56Z",
"published": "2021-02-26T16:15:00Z",
"references": [
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2021-23979"
},
{
"type": "REPORT",
"url": "https://www.mozilla.org/en-US/security/advisories/mfsa2021-07/#CVE-2021-23979"
},
{
"type": "REPORT",
"url": "https://bugzilla.mozilla.org/buglist.cgi?bug_id=1663222%2C1666607%2C1672120%2C1678463%2C1678927%2C1679560%2C1681297%2C1681684%2C1683490%2C1684377%2C1684902"
},
{
"type": "REPORT",
"url": "https://www.mozilla.org/security/advisories/mfsa2021-07/"
},
{
"type": "ADVISORY",
"url": "https://ubuntu.com/security/notices/USN-4756-1"
},
{
"type": "REPORT",
"url": "https://www.cve.org/CVERecord?id=CVE-2021-23979"
}
],
"related": [
"USN-4756-1"
],
"schema_version": "1.7.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
],
"upstream": [
"CVE-2021-23979"
]
}
Loading…
Trend slope:
-
(linear fit over daily sighting counts)
Show additional events:
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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