CVE-2021-37866 Session is not invalidated on server-side when user logged out of Boards
Attackers can reuse old session tokens after logout to maintain unauthorized access to Mattermost Boards accounts.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2021-37866?
CVE-2021-37866 is a medium-severity authentication bypass vulnerability in Mattermost Boards, published on 18 Jan 2022. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official description
Mattermost Boards plugin v0.10.0 and earlier fails to invalidate a session on the server-side when a user logged out of Boards, which allows an attacker to reuse old session token for authorization.
Weakness: CWE-613
Which versions are affected by CVE-2021-37866?
It affects 1 product.
Products include Mattermost Mattermost Boards.
How do I fix CVE-2021-37866?
No fix has been published for CVE-2021-37866 yet. Limit exposure of the affected software until one is available.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2021-37866 being exploited?
There is no known exploitation of CVE-2021-37866 in the wild and no public exploit code.
Other vulnerabilities in Mattermost Boards
Sources
Also known as GHSA-g28x-633f-r8qf.