CVE-2021-32689

Nextcloud Talk not properly disassociating users from chats after account deletion

State: Published
Severity: 8.1 High
Published: Jul 12, 2021
Updated: Aug 3, 2024
Reserved: May 12, 2021

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.

Scores

CVSS	Score	Vector	Source
3.1	8.1 High	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N	GitHub_M

Weaknesses

CWE-708 Incorrect Ownership Assignment
CWE-200 Exposure of Sensitive Information to an Unauthorized Actor

Affected Products

Product	Versions
security-advisoriesnextcloud	< 11.2.2Affected

References

Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.