CVE-2025-66557 (GCVE-0-2025-66557)
Vulnerability from cvelistv5
Published
2025-12-05 17:28
Modified
2025-12-05 17:28
Severity ?
VLAI Severity ?
EPSS score ?
CWE
- CWE-284 - Improper Access Control
Summary
Nextcloud Deck is a kanban style organization tool aimed at personal planning and project organization for teams integrated with Nextcloud. Prior to 1.14.6 and 1.15.2, a bug in the permission logic allowed users with "Can share" permission to modify the permissions of other recipients. This vulnerability is fixed in 1.14.6 and 1.15.2.
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| nextcloud | security-advisories |
Version: >= 1.15.0-beta.1, < 1.15.2 Version: < 1.14.6 |
{
"containers": {
"cna": {
"affected": [
{
"product": "security-advisories",
"vendor": "nextcloud",
"versions": [
{
"status": "affected",
"version": "\u003e= 1.15.0-beta.1, \u003c 1.15.2"
},
{
"status": "affected",
"version": "\u003c 1.14.6"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "Nextcloud Deck is a kanban style organization tool aimed at personal planning and project organization for teams integrated with Nextcloud. Prior to 1.14.6 and 1.15.2, a bug in the permission logic allowed users with \"Can share\" permission to modify the permissions of other recipients. This vulnerability is fixed in 1.14.6 and 1.15.2."
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "LOW",
"baseScore": 5.4,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "NONE",
"integrityImpact": "LOW",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L",
"version": "3.1"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-284",
"description": "CWE-284: Improper Access Control",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2025-12-05T17:28:48.642Z",
"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"shortName": "GitHub_M"
},
"references": [
{
"name": "https://github.com/nextcloud/security-advisories/security/advisories/GHSA-wwr8-hx9g-rjvv",
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://github.com/nextcloud/security-advisories/security/advisories/GHSA-wwr8-hx9g-rjvv"
},
{
"name": "https://github.com/nextcloud/deck/pull/7131",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/nextcloud/deck/pull/7131"
},
{
"name": "https://github.com/nextcloud/deck/commit/f1da8b30a455f02373d44154da04494c949a95ae",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/nextcloud/deck/commit/f1da8b30a455f02373d44154da04494c949a95ae"
},
{
"name": "https://hackerone.com/reports/3247499",
"tags": [
"x_refsource_MISC"
],
"url": "https://hackerone.com/reports/3247499"
}
],
"source": {
"advisory": "GHSA-wwr8-hx9g-rjvv",
"discovery": "UNKNOWN"
},
"title": "Nextcloud Deck app allowed user with \"Can share\" permission to modify permissions of other non-owners"
}
},
"cveMetadata": {
"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"assignerShortName": "GitHub_M",
"cveId": "CVE-2025-66557",
"datePublished": "2025-12-05T17:28:48.642Z",
"dateReserved": "2025-12-04T16:01:32.473Z",
"dateUpdated": "2025-12-05T17:28:48.642Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"nvd": "{\"cve\":{\"id\":\"CVE-2025-66557\",\"sourceIdentifier\":\"security-advisories@github.com\",\"published\":\"2025-12-05T18:15:58.977\",\"lastModified\":\"2025-12-05T18:15:58.977\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"Nextcloud Deck is a kanban style organization tool aimed at personal planning and project organization for teams integrated with Nextcloud. Prior to 1.14.6 and 1.15.2, a bug in the permission logic allowed users with \\\"Can share\\\" permission to modify the permissions of other recipients. This vulnerability is fixed in 1.14.6 and 1.15.2.\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"security-advisories@github.com\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L\",\"baseScore\":5.4,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"LOW\",\"availabilityImpact\":\"LOW\"},\"exploitabilityScore\":2.8,\"impactScore\":2.5}]},\"weaknesses\":[{\"source\":\"security-advisories@github.com\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-284\"}]}],\"references\":[{\"url\":\"https://github.com/nextcloud/deck/commit/f1da8b30a455f02373d44154da04494c949a95ae\",\"source\":\"security-advisories@github.com\"},{\"url\":\"https://github.com/nextcloud/deck/pull/7131\",\"source\":\"security-advisories@github.com\"},{\"url\":\"https://github.com/nextcloud/security-advisories/security/advisories/GHSA-wwr8-hx9g-rjvv\",\"source\":\"security-advisories@github.com\"},{\"url\":\"https://hackerone.com/reports/3247499\",\"source\":\"security-advisories@github.com\"}]}}"
}
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
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