Headline
CVE-2023-28845: Chat room membership disclosed via autocompletion when not a member yourself
Nextcloud talk is a video & audio conferencing app for Nextcloud. In affected versions the talk app does not properly filter access to a conversations member list. As a result an attacker could use this vulnerability to gain information about the members of a Talk conversation, even if they themselves are not members. It is recommended that the Nextcloud Talk is upgraded to 14.0.9 or 15.0.4. There are no known workarounds for this vulnerability.
Affected versions
>= 14.0.0, >= 15.0.0
Patched versions
14.0.9, 15.0.4
Description
Impact
An attacker could use this vulnerability to gain information about the members of a Talk conversation, even if they themselves are not members.
Patches
It is recommended that the Nextcloud Talk is upgraded to 14.0.9 or 15.0.4
Workarounds
- No workaround available
References
- HackerOne
- PullRequest
For more information
If you have any questions or comments about this advisory:
- Create a post in nextcloud/security-advisories
- Customers: Open a support ticket at support.nextcloud.com