{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2025-66547","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","state":"PUBLISHED","assignerShortName":"GitHub_M","dateReserved":"2025-12-04T15:52:26.550Z","datePublished":"2025-12-05T16:32:17.359Z","dateUpdated":"2025-12-05T18:20:43.503Z"},"containers":{"cna":{"title":"Nextcloud Server users can modify tags on files that do not belong to them","problemTypes":[{"descriptions":[{"cweId":"CWE-639","lang":"en","description":"CWE-639: Authorization Bypass Through User-Controlled Key","type":"CWE"}]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":4.3,"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:N","version":"3.1"}}],"references":[{"name":"https://github.com/nextcloud/security-advisories/security/advisories/GHSA-hq6c-r898-fgf2","tags":["x_refsource_CONFIRM"],"url":"https://github.com/nextcloud/security-advisories/security/advisories/GHSA-hq6c-r898-fgf2"},{"name":"https://github.com/nextcloud/server/issues/51247","tags":["x_refsource_MISC"],"url":"https://github.com/nextcloud/server/issues/51247"},{"name":"https://github.com/nextcloud/server/pull/51288","tags":["x_refsource_MISC"],"url":"https://github.com/nextcloud/server/pull/51288"},{"name":"https://github.com/nextcloud/server/commit/b44f1568f2dc97c746281d99e2342ad679e3d8a9","tags":["x_refsource_MISC"],"url":"https://github.com/nextcloud/server/commit/b44f1568f2dc97c746281d99e2342ad679e3d8a9"},{"name":"https://hackerone.com/reports/3040887","tags":["x_refsource_MISC"],"url":"https://hackerone.com/reports/3040887"}],"affected":[{"vendor":"nextcloud","product":"security-advisories","versions":[{"version":"< 31.0.1","status":"affected"}]}],"providerMetadata":{"orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M","dateUpdated":"2025-12-05T16:32:17.359Z"},"descriptions":[{"lang":"en","value":"Nextcloud Server is a self hosted personal cloud system. In Nextcloud Server and Enterprise Server prior to 31.0.1, non-privileged users can modify tags on files they should not have access to via bulk tagging. This vulnerability is fixed in 31.0.1."}],"source":{"advisory":"GHSA-hq6c-r898-fgf2","discovery":"UNKNOWN"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2025-12-05T18:20:11.023676Z","id":"CVE-2025-66547","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":"2025-12-05T18:20:43.503Z"}}]}}