{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2025-66556","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","state":"PUBLISHED","assignerShortName":"GitHub_M","dateReserved":"2025-12-04T16:01:32.472Z","datePublished":"2025-12-05T17:56:44.463Z","dateUpdated":"2025-12-05T18:09:34.326Z"},"containers":{"cna":{"title":"Nextcloud talk allows participants to blindly delete poll drafts of other users by ID","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":3.5,"baseSeverity":"LOW","confidentialityImpact":"NONE","integrityImpact":"LOW","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N","version":"3.1"}}],"references":[{"name":"https://github.com/nextcloud/security-advisories/security/advisories/GHSA-pr9f-vqgg-m2jh","tags":["x_refsource_CONFIRM"],"url":"https://github.com/nextcloud/security-advisories/security/advisories/GHSA-pr9f-vqgg-m2jh"},{"name":"https://github.com/nextcloud/spreed/pull/15532","tags":["x_refsource_MISC"],"url":"https://github.com/nextcloud/spreed/pull/15532"},{"name":"https://github.com/nextcloud/spreed/commit/bd68e80d1dea98d84c1d621c2c681238cf041725","tags":["x_refsource_MISC"],"url":"https://github.com/nextcloud/spreed/commit/bd68e80d1dea98d84c1d621c2c681238cf041725"},{"name":"https://hackerone.com/reports/3247386","tags":["x_refsource_MISC"],"url":"https://hackerone.com/reports/3247386"}],"affected":[{"vendor":"nextcloud","product":"security-advisories","versions":[{"version":"< 20.1.8","status":"affected"},{"version":">= 21.0.0-beta.1, < 21.1.2","status":"affected"}]}],"providerMetadata":{"orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M","dateUpdated":"2025-12-05T17:56:44.463Z"},"descriptions":[{"lang":"en","value":"Nextcloud talk is a video & audio conferencing app for Nextcloud. Prior to 20.1.8 and 21.1.2, a participant with chat permissions was able to delete poll drafts of other participants within the conversation based on their numeric ID. This vulnerability is fixed in 20.1.8 and 21.1.2."}],"source":{"advisory":"GHSA-pr9f-vqgg-m2jh","discovery":"UNKNOWN"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2025-12-05T18:08:50.955809Z","id":"CVE-2025-66556","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":"2025-12-05T18:09:34.326Z"}}]}}