CVEvulnerability
CVE-2025-66556
4.3 MEDIUM
Official page ↗
- Status
- Analyzed
- Published
- 2025-12-05
- Last modified
- 2026-10-15
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 3.5 LOW — CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N
- CVSS 3.1 ([email protected])
- 4.3 MEDIUM — CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
- Weaknesses
- CWE-639
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.
Affected configurations
• nextcloud talk (>= 20.0.0 < 20.1.8)
• nextcloud talk (>= 21.0.0 < 21.1.2)
Related
Weakness · CWE (1)
- CWE-639 Authorization Bypass Through User-Controlled Key weakness
References
- https://github.com/nextcloud/security-advisories/security/advisories/GHSA-pr9f-vqgg-m2jh Patch, Vendor Advisory
- https://github.com/nextcloud/spreed/commit/bd68e80d1dea98d84c1d621c2c681238cf041725 Patch
- https://github.com/nextcloud/spreed/pull/15532 Issue Tracking, Patch
- https://hackerone.com/reports/3247386 Issue Tracking, Vendor Advisory