Description
Nextcloud Talk is a fully on-premises audio/video and chat communication service. In versions prior to 11.2.2, if a user was able to reuse an earlier used username, they could get access to any chat message sent to the previous user with this username. The issue was patched in versions 11.2.2 and 11.3.0. As a workaround, don't allow users to choose usernames themselves. This is the default behaviour of Nextcloud, but some user providers may allow doing so.
Metrics
CVSS 3.1 6.5/10
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:NWeakness enumeration
Affected software
| Vendor | Product | Versions |
|---|---|---|
| nextcloud | security-advisories | < 11.2.2 |
References
- https://github.com/nextcloud/security-advisories/security/advisories/GHSA-xv6f-344w-895cThird Party Advisory
- https://github.com/nextcloud/spreed/pull/5633Patch, Third Party Advisory
- https://github.com/nextcloud/spreed/releases/tag/v11.2.2Release Notes, Third Party Advisory
- https://github.com/nextcloud/spreed/releases/tag/v11.3.0Release Notes, Third Party Advisory
- https://hackerone.com/reports/1200700Permissions Required
- https://github.com/nextcloud/security-advisories/security/advisories/GHSA-xv6f-344w-895cThird Party Advisory
- https://github.com/nextcloud/spreed/pull/5633Patch, Third Party Advisory
- https://github.com/nextcloud/spreed/releases/tag/v11.2.2Release Notes, Third Party Advisory
- https://github.com/nextcloud/spreed/releases/tag/v11.3.0Release Notes, Third Party Advisory
- https://hackerone.com/reports/1200700Permissions Required
Timeline
- Published
- Jul 12, 2021
- Last modified
- Jun 17, 2026
- NVD status
- Modified