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vuln-cve/data/2025/66xxx/CVE-2025-66557.json
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{
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"cveMetadata": {
"cveId": "CVE-2025-66557",
"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"state": "PUBLISHED",
"assignerShortName": "GitHub_M",
"dateReserved": "2025-12-04T16:01:32.473Z",
"datePublished": "2025-12-05T17:28:48.642Z",
"dateUpdated": "2025-12-08T20:12:45.372Z"
},
"containers": {
"cna": {
"title": "Nextcloud Deck app allowed user with \"Can share\" permission to modify permissions of other non-owners",
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-284",
"lang": "en",
"description": "CWE-284: Improper Access Control",
"type": "CWE"
}
]
}
],
"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"
}
}
],
"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"
}
],
"affected": [
{
"vendor": "nextcloud",
"product": "security-advisories",
"versions": [
{
"version": ">= 1.15.0-beta.1, < 1.15.2",
"status": "affected"
},
{
"version": "< 1.14.6",
"status": "affected"
}
]
}
],
"providerMetadata": {
"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"shortName": "GitHub_M",
"dateUpdated": "2025-12-05T17:28:48.642Z"
},
"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."
}
],
"source": {
"advisory": "GHSA-wwr8-hx9g-rjvv",
"discovery": "UNKNOWN"
}
},
"adp": [
{
"metrics": [
{
"other": {
"type": "ssvc",
"content": {
"timestamp": "2025-12-08T20:12:37.565515Z",
"id": "CVE-2025-66557",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"version": "2.0.3"
}
}
}
],
"title": "CISA ADP Vulnrichment",
"providerMetadata": {
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP",
"dateUpdated": "2025-12-08T20:12:45.372Z"
}
}
]
}
}