CVE-2025-66556: Nextcloud talk allows participants to blindly delete poll drafts of other users by ID
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 Software
Remediation
Patch Available
Event History
Frequently Asked Questions
What is the severity of CVE-2025-66556?
CVE-2025-66556 has a medium severity due to the potential for unauthorized deletion of poll drafts by users with chat permissions.
How do I fix CVE-2025-66556?
To fix CVE-2025-66556, update Nextcloud Talk to version 20.1.8 or later, or 21.1.2 or later.
Which versions of Nextcloud Talk are affected by CVE-2025-66556?
CVE-2025-66556 affects Nextcloud Talk versions prior to 20.1.8 and 21.1.2.
What is the impact of CVE-2025-66556 on Nextcloud users?
The impact of CVE-2025-66556 allows users with chat permissions to delete poll drafts created by other participants.
Is there a workaround for CVE-2025-66556?
There is no official workaround for CVE-2025-66556; the only resolution is to upgrade to a patched version.