{"id":"CVE-2025-66556","title":"Nextcloud talk is a video & audio conferencing app for Nextcloud","summary":"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. Thi…","severity":"low","cvss":3.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N","cwe":["CWE-639"],"vendor":"nextcloud","product":"talk","affected":["talk >= 20.0.0, < 20.1.8","talk >= 21.0.0, < 21.1.2"],"patched":["talk 21.1.2"],"published":"2025-12-05","updated":"2026-10-15","sourceUpdated":"2026-10-15T21:10:00.327","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2025-66556","references":[{"url":"https://github.com/nextcloud/security-advisories/security/advisories/GHSA-pr9f-vqgg-m2jh","label":"security-advisories@github.com"},{"url":"https://github.com/nextcloud/spreed/commit/bd68e80d1dea98d84c1d621c2c681238cf041725","label":"security-advisories@github.com"},{"url":"https://github.com/nextcloud/spreed/pull/15532","label":"security-advisories@github.com"},{"url":"https://hackerone.com/reports/3247386","label":"security-advisories@github.com"}],"tags":["nvd"],"epss":0.00253,"epssPercentile":0.16757,"ingestedAt":"2026-10-27T18:12:09.280Z","slug":"CVE-2025-66556","body":"## Overview\n\nNextcloud 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.\n\n## Affected\n\n- `talk >= 20.0.0, < 20.1.8`\n- `talk >= 21.0.0, < 21.1.2`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `talk 21.1.2`","depth":"sunlit","depthScore":19,"depthScoreParts":{"impact":19.3,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}