CVE-2021-32689: Nextcloud Talk not properly disassociating users from chats after account deletion
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.
Affected Software
Remediation
Patch Available
Event History
Frequently Asked Questions
What is the vulnerability ID of Nextcloud Talk?
The vulnerability ID of Nextcloud Talk is CVE-2021-32689.
What is the severity of CVE-2021-32689?
The severity of CVE-2021-32689 is high.
How does CVE-2021-32689 affect Nextcloud Talk?
CVE-2021-32689 allows an attacker to access chat messages sent to a previous user with a reused username in Nextcloud Talk versions prior to 11.2.2.
Which software versions are affected by CVE-2021-32689?
CVE-2021-32689 affects Nextcloud Talk versions prior to 11.2.2.
Is CVE-2021-32689 patched?
Yes, CVE-2021-32689 has been patched in Nextcloud Talk versions 11.2.2 and 11.