CWE-295
AllowedImproper Certificate Validation
Abstraction: Base · Status: Draft
The product does not validate, or incorrectly validates, a certificate.
2255 vulnerabilities reference this CWE, most recent first.
GHSA-4C56-C2PH-PP8X
Vulnerability from github – Published: 2026-07-29 09:31 – Updated: 2026-07-29 09:31Apache Traffic Server reuses multiplexed HTTP/2 origin connections without verifying the server certificate covers the new request hostname.
This issue affects Apache Traffic Server: from 9.0.0 through 9.2.14, from 10.0.0 through 10.1.3.
Users are recommended to upgrade to version 9.2.15 or 10.1.4, which fix the issue.
{
"affected": [],
"aliases": [
"CVE-2026-65325"
],
"database_specific": {
"cwe_ids": [
"CWE-295"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-07-29T09:16:30Z",
"severity": "MODERATE"
},
"details": "Apache Traffic Server reuses multiplexed HTTP/2 origin connections without verifying the server certificate covers the new request hostname.\n\nThis issue affects Apache Traffic Server: from 9.0.0 through 9.2.14, from 10.0.0 through 10.1.3.\n\nUsers are recommended to upgrade to version 9.2.15 or 10.1.4, which fix the issue.",
"id": "GHSA-4c56-c2ph-pp8x",
"modified": "2026-07-29T09:31:30Z",
"published": "2026-07-29T09:31:30Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-65325"
},
{
"type": "WEB",
"url": "https://lists.apache.org/thread/5prl9glcm9g2swnq9hqxvnokylm1gr6d"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N",
"type": "CVSS_V3"
},
{
"score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
"type": "CVSS_V4"
}
]
}
GHSA-4CQM-XV6V-78C5
Vulnerability from github – Published: 2022-05-24 19:07 – Updated: 2022-05-24 19:07Fossil before 2.14.2 and 2.15.x before 2.15.2 often skips the hostname check during TLS certificate validation.
{
"affected": [],
"aliases": [
"CVE-2021-36377"
],
"database_specific": {
"cwe_ids": [
"CWE-295"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2021-07-12T13:15:00Z",
"severity": "HIGH"
},
"details": "Fossil before 2.14.2 and 2.15.x before 2.15.2 often skips the hostname check during TLS certificate validation.",
"id": "GHSA-4cqm-xv6v-78c5",
"modified": "2022-05-24T19:07:31Z",
"published": "2022-05-24T19:07:31Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2021-36377"
},
{
"type": "WEB",
"url": "https://fossil-scm.org/forum/forumpost/8d367e16f53d93c789d70bd3bf2c9587227bbd5c6a7b8e512cccd79007536036"
},
{
"type": "WEB",
"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/JBTRZ5HCOUTIIKJF3T37NORI4P7EVYCY"
}
],
"schema_version": "1.4.0",
"severity": []
}
GHSA-4CX5-3Q2W-5WR7
Vulnerability from github – Published: 2025-07-01 15:31 – Updated: 2025-07-01 15:31An improper certificate validation vulnerability exists in AVTECH IP cameras, DVRs, and NVRs due to the use of wget with --no-check-certificate in scripts like SyncCloudAccount.sh and SyncPermit.sh. This exposes HTTPS communications to man-in-the-middle (MITM) attacks.
{
"affected": [],
"aliases": [
"CVE-2025-34066"
],
"database_specific": {
"cwe_ids": [
"CWE-295"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-07-01T15:15:25Z",
"severity": "HIGH"
},
"details": "An improper certificate validation vulnerability exists in AVTECH IP cameras, DVRs, and NVRs due to the use of wget with --no-check-certificate in scripts like SyncCloudAccount.sh and SyncPermit.sh. This exposes HTTPS communications to man-in-the-middle (MITM) attacks.",
"id": "GHSA-4cx5-3q2w-5wr7",
"modified": "2025-07-01T15:31:10Z",
"published": "2025-07-01T15:31:10Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-34066"
},
{
"type": "WEB",
"url": "https://avtech.com"
},
{
"type": "WEB",
"url": "https://vulncheck.com/advisories/avtech-ipcamera-nvr-dvr-mulitple-vulns"
},
{
"type": "WEB",
"url": "https://web.archive.org/web/20161029201749/https://github.com/ebux/AVTECH"
},
{
"type": "WEB",
"url": "https://web.archive.org/web/20240810225729/https://www.search-lab.hu/advisories/126-AVTech-devices-multiple-vulnerabilities"
},
{
"type": "WEB",
"url": "https://www.exploit-db.com/exploits/40500"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:L/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
"type": "CVSS_V4"
}
]
}
GHSA-4F68-49QQ-H392
Vulnerability from github – Published: 2021-05-24 18:12 – Updated: 2023-09-05 21:47em-imap 0.5 and earlier use the library eventmachine in an insecure way that allows an attacker to perform a man-in-the-middle attack against users of the library. The hostname in a TLS server certificate is not verified.
{
"affected": [
{
"package": {
"ecosystem": "RubyGems",
"name": "em-imap"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"last_affected": "0.5"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2020-13163"
],
"database_specific": {
"cwe_ids": [
"CWE-295"
],
"github_reviewed": true,
"github_reviewed_at": "2021-05-20T22:25:15Z",
"nvd_published_at": "2020-05-19T22:15:00Z",
"severity": "HIGH"
},
"details": "em-imap 0.5 and earlier use the library eventmachine in an insecure way that allows an attacker to perform a man-in-the-middle attack against users of the library. The hostname in a TLS server certificate is not verified.",
"id": "GHSA-4f68-49qq-h392",
"modified": "2023-09-05T21:47:52Z",
"published": "2021-05-24T18:12:20Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2020-13163"
},
{
"type": "WEB",
"url": "https://github.com/ConradIrwin/em-imap/issues/25"
},
{
"type": "PACKAGE",
"url": "https://github.com/ConradIrwin/em-imap"
},
{
"type": "ADVISORY",
"url": "https://securitylab.github.com/advisories/GHSL-2020-095-conradirwin-em-imap"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N",
"type": "CVSS_V3"
}
],
"summary": "Improper certificate validation in em-imap"
}
GHSA-4F6R-FQ28-V5M3
Vulnerability from github – Published: 2026-09-09 09:33 – Updated: 2026-09-09 09:33Dell SCG 5.0 Appliance versions prior to 5.36.00.16 and Dell SCG 5.0 Application versions prior to 5.36.00.00, contains an Improper Certificate Validation vulnerability. An unauthenticated attacker with remote access could potentially exploit this vulnerability, leading to protection mechanism bypass.
{
"affected": [],
"aliases": [
"CVE-2026-79967"
],
"database_specific": {
"cwe_ids": [
"CWE-295"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-09-09T09:17:11Z",
"severity": "MODERATE"
},
"details": "Dell SCG 5.0 Appliance versions prior to 5.36.00.16 and Dell SCG 5.0 Application versions prior to 5.36.00.00, contains an Improper Certificate Validation vulnerability. An unauthenticated attacker with remote access could potentially exploit this vulnerability, leading to protection mechanism bypass.",
"id": "GHSA-4f6r-fq28-v5m3",
"modified": "2026-09-09T09:33:00Z",
"published": "2026-09-09T09:33:00Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-79967"
},
{
"type": "WEB",
"url": "https://www.dell.com/support/kbdoc/en-in/000503426/dsa-2026-382-security-update-for-dell-secure-connect-gateway-virtual-edition-multiple-vulnerabilities"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L",
"type": "CVSS_V3"
}
]
}
GHSA-4FCV-23V2-WCM4
Vulnerability from github – Published: 2026-09-23 00:31 – Updated: 2026-09-23 00:31IBM Financial Transaction Manager (FTM) for RedHat OpenShift could allow a remote attacker to obtain sensitive information due to improper enforcement of mutual TLS authentication.
{
"affected": [],
"aliases": [
"CVE-2026-18173"
],
"database_specific": {
"cwe_ids": [
"CWE-295"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-09-22T23:17:07Z",
"severity": "LOW"
},
"details": "IBM Financial Transaction Manager (FTM) for RedHat OpenShift could allow a remote attacker to obtain sensitive information due to improper enforcement of mutual TLS authentication.",
"id": "GHSA-4fcv-23v2-wcm4",
"modified": "2026-09-23T00:31:14Z",
"published": "2026-09-23T00:31:14Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-18173"
},
{
"type": "WEB",
"url": "https://www.ibm.com/support/pages/node/7288641"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N",
"type": "CVSS_V3"
}
]
}
GHSA-4FGH-2VXJ-RHG5
Vulnerability from github – Published: 2022-05-13 01:32 – Updated: 2022-05-13 01:32Philips IntelliSpace Portal all versions of 8.0.x, and 7.0.x have an SSL incorrect hostname certificate vulnerability this could allow an attacker to gain unauthorized access to resources and information.
{
"affected": [],
"aliases": [
"CVE-2018-5462"
],
"database_specific": {
"cwe_ids": [
"CWE-295"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2018-03-26T14:29:00Z",
"severity": "HIGH"
},
"details": "Philips IntelliSpace Portal all versions of 8.0.x, and 7.0.x have an SSL incorrect hostname certificate vulnerability this could allow an attacker to gain unauthorized access to resources and information.",
"id": "GHSA-4fgh-2vxj-rhg5",
"modified": "2022-05-13T01:32:07Z",
"published": "2022-05-13T01:32:07Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2018-5462"
},
{
"type": "WEB",
"url": "https://ics-cert.us-cert.gov/advisories/ICSMA-18-058-02"
},
{
"type": "WEB",
"url": "https://www.usa.philips.com/healthcare/about/customer-support/product-security"
},
{
"type": "WEB",
"url": "http://www.securityfocus.com/bid/103182"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
"type": "CVSS_V3"
}
]
}
GHSA-4G3G-C4GJ-WQR7
Vulnerability from github – Published: 2022-05-24 17:31 – Updated: 2024-11-26 18:38A vulnerability in the host input API daemon of Cisco Firepower Management Center (FMC) Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. The vulnerability is due to improper certificate validation. An attacker could exploit this vulnerability by sending a crafted data stream to the host input daemon of the affected device. A successful exploit could allow the attacker to cause the host input daemon to restart. The attacker could use repeated attacks to cause the daemon to continuously reload, creating a DoS condition for the API.
{
"affected": [],
"aliases": [
"CVE-2020-3557"
],
"database_specific": {
"cwe_ids": [
"CWE-295"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2020-10-21T19:15:00Z",
"severity": "MODERATE"
},
"details": "A vulnerability in the host input API daemon of Cisco Firepower Management Center (FMC) Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. The vulnerability is due to improper certificate validation. An attacker could exploit this vulnerability by sending a crafted data stream to the host input daemon of the affected device. A successful exploit could allow the attacker to cause the host input daemon to restart. The attacker could use repeated attacks to cause the daemon to continuously reload, creating a DoS condition for the API.",
"id": "GHSA-4g3g-c4gj-wqr7",
"modified": "2024-11-26T18:38:40Z",
"published": "2022-05-24T17:31:47Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2020-3557"
},
{
"type": "WEB",
"url": "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-fmc-dos-3WymYWKh"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
"type": "CVSS_V3"
}
]
}
GHSA-4G9C-MHJQ-QV3G
Vulnerability from github – Published: 2022-05-13 01:24 – Updated: 2025-04-20 03:39The "PCB Mobile" by Phelps County Bank app 3.0.2 -- aka pcb-mobile/id436891295 for iOS does not verify X.509 certificates from SSL servers, which allows man-in-the-middle attackers to spoof servers and obtain sensitive information via a crafted certificate.
{
"affected": [],
"aliases": [
"CVE-2017-9591"
],
"database_specific": {
"cwe_ids": [
"CWE-295"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2017-06-16T12:29:00Z",
"severity": "MODERATE"
},
"details": "The \"PCB Mobile\" by Phelps County Bank app 3.0.2 -- aka pcb-mobile/id436891295 for iOS does not verify X.509 certificates from SSL servers, which allows man-in-the-middle attackers to spoof servers and obtain sensitive information via a crafted certificate.",
"id": "GHSA-4g9c-mhjq-qv3g",
"modified": "2025-04-20T03:39:13Z",
"published": "2022-05-13T01:24:28Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2017-9591"
},
{
"type": "WEB",
"url": "https://medium.com/%40chronic_9612/advisory-44-credit-union-apps-for-ios-may-allow-login-credential-exposure-4d2f380b85c5"
},
{
"type": "WEB",
"url": "https://medium.com/@chronic_9612/advisory-44-credit-union-apps-for-ios-may-allow-login-credential-exposure-4d2f380b85c5"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N",
"type": "CVSS_V3"
}
]
}
GHSA-4GF7-M762-7XQ9
Vulnerability from github – Published: 2022-05-24 22:00 – Updated: 2023-02-03 21:30IBM QRadar SIEM 7.2.8 WinCollect could allow an attacker to obtain sensitive information by spoofing a trusted entity using man in the middle techniques due to not validating or incorrectly validating a certificate. IBM X-Force ID: 160072.
{
"affected": [],
"aliases": [
"CVE-2019-4264"
],
"database_specific": {
"cwe_ids": [
"CWE-295"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2019-05-29T15:29:00Z",
"severity": "MODERATE"
},
"details": "IBM QRadar SIEM 7.2.8 WinCollect could allow an attacker to obtain sensitive information by spoofing a trusted entity using man in the middle techniques due to not validating or incorrectly validating a certificate. IBM X-Force ID: 160072.",
"id": "GHSA-4gf7-m762-7xq9",
"modified": "2023-02-03T21:30:28Z",
"published": "2022-05-24T22:00:00Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2019-4264"
},
{
"type": "WEB",
"url": "https://exchange.xforce.ibmcloud.com/vulnerabilities/160072"
},
{
"type": "WEB",
"url": "https://www.ibm.com/support/docview.wss?uid=ibm10885464"
},
{
"type": "WEB",
"url": "http://www.securityfocus.com/bid/108535"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N",
"type": "CVSS_V3"
}
]
}
Mitigation
Certificates should be carefully managed and checked to assure that data are encrypted with the intended owner's public key.
Mitigation
If certificate pinning is being used, ensure that all relevant properties of the certificate are fully validated before the certificate is pinned, including the hostname.
CAPEC-459: Creating a Rogue Certification Authority Certificate
An adversary exploits a weakness resulting from using a hashing algorithm with weak collision resistance to generate certificate signing requests (CSR) that contain collision blocks in their "to be signed" parts. The adversary submits one CSR to be signed by a trusted certificate authority then uses the signed blob to make a second certificate appear signed by said certificate authority. Due to the hash collision, both certificates, though different, hash to the same value and so the signed blob works just as well in the second certificate. The net effect is that the adversary's second X.509 certificate, which the Certification Authority has never seen, is now signed and validated by that Certification Authority.
CAPEC-475: Signature Spoofing by Improper Validation
An adversary exploits a cryptographic weakness in the signature verification algorithm implementation to generate a valid signature without knowing the key.