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.
References (5)
Core 5
Core References
Third Party Advisory x_refsource_confirm
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-xv6f-344w-895c
Patch, Third Party Advisory x_refsource_misc
https://github.com/nextcloud/spreed/pull/5633
Permissions Required x_refsource_misc
https://hackerone.com/reports/1200700
Release Notes, Third Party Advisory x_refsource_misc
https://github.com/nextcloud/spreed/releases/tag/v11.2.2
Release Notes, Third Party Advisory x_refsource_misc
https://github.com/nextcloud/spreed/releases/tag/v11.3.0
Scores
CVSS v3
8.1
EPSS
0.0026
EPSS Percentile
49.1%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
Details
CWE
CWE-200
CWE-708
Status
published
Products (1)
nextcloud/talk
< 11.2.2
Published
Jul 12, 2021
Tracked Since
Feb 18, 2026