CVE-2022-41963 BigBlueButton contains Improper Preservation of Permissions for whiteboard

Low 2.7 Published 16 Dec 2022 Updated 17 Apr 2025

Attackers can perform whiteboard actions after access revocation due to a grace period, requiring an upgrade to BigBlueButton.

Exploited in the wild: Not known
Login needed: An administrator
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2022-41963?

CVE-2022-41963 is a low-severity missing authorization vulnerability in bigbluebutton, published on 16 Dec 2022. An attacker needs administrator access to exploit it, with no action from the victim.

Official description

BigBlueButton is an open source web conferencing system. Versions prior to 2.4.3 contain a whiteboard grace period that exists to handle delayed messages, but this grace period could be used by attackers to take actions in the few seconds after their access is revoked. The attacker must be a meeting participant. This issue is patched in version 2.4.3 an version 2.5-alpha-1

Weakness: CWE-281

Which versions are affected by CVE-2022-41963?

It affects 1 product.

Products include Bigbluebutton Bigbluebutton.

How do I fix CVE-2022-41963?

No fix has been published for CVE-2022-41963 yet. Limit exposure of the affected software until one is available.

Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.

Is CVE-2022-41963 being exploited?

There is no known exploitation of CVE-2022-41963 in the wild and no public exploit code.

Sources

Also known as GHSA-v6p9-926c-6qfp.