{"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"}}]}}