{"id":"CVE-2025-66556","state":"PUBLISHED","title":"Nextcloud talk allows participants to blindly delete poll drafts of other users by ID","description":"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.","publishedAt":"2025-12-05T17:56:44.463Z","updatedAt":"2025-12-05T18:09:34.326Z","severity":{"score":3.5,"label":"Low","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N","source":"GitHub_M"},"assigner":"GitHub_M","products":["nextcloud security-advisories"],"affected":[{"vendor":"nextcloud","product":"security-advisories","versions":[{"version":"< 20.1.8","status":"affected"},{"version":">= 21.0.0-beta.1, < 21.1.2","status":"affected"}]}],"references":["https://github.com/nextcloud/security-advisories/security/advisories/GHSA-pr9f-vqgg-m2jh","https://github.com/nextcloud/spreed/pull/15532","https://github.com/nextcloud/spreed/commit/bd68e80d1dea98d84c1d621c2c681238cf041725","https://hackerone.com/reports/3247386"],"weaknesses":["CWE-639"],"ingestedAt":"2026-10-29T20:09:56.034Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2025/66xxx/CVE-2025-66556.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2025-66556","state":"PUBLISHED","datePublished":"2025-12-05T17:56:44.463Z","dateUpdated":"2025-12-05T18:09:34.326Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2025-12-04T16:01:32.472Z"},"containers":{"cna":{"title":"Nextcloud talk allows participants to blindly delete poll drafts of other users by ID","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."}],"affected":[{"vendor":"nextcloud","product":"security-advisories","versions":[{"version":"< 20.1.8","status":"affected"},{"version":">= 21.0.0-beta.1, < 21.1.2","status":"affected"}]}],"references":[{"url":"https://github.com/nextcloud/security-advisories/security/advisories/GHSA-pr9f-vqgg-m2jh","name":"https://github.com/nextcloud/security-advisories/security/advisories/GHSA-pr9f-vqgg-m2jh","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/nextcloud/spreed/pull/15532","name":"https://github.com/nextcloud/spreed/pull/15532","tags":["x_refsource_MISC"]},{"url":"https://github.com/nextcloud/spreed/commit/bd68e80d1dea98d84c1d621c2c681238cf041725","name":"https://github.com/nextcloud/spreed/commit/bd68e80d1dea98d84c1d621c2c681238cf041725","tags":["x_refsource_MISC"]},{"url":"https://hackerone.com/reports/3247386","name":"https://hackerone.com/reports/3247386","tags":["x_refsource_MISC"]}],"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"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-639","lang":"en","description":"CWE-639: Authorization Bypass Through User-Controlled Key","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2025-12-05T17:56:44.463Z"},"source":{"advisory":"GHSA-pr9f-vqgg-m2jh","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","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"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2025-12-05T18:09:34.326Z"}}]}}}