CVE-2022-23490 Improper access control to polling votes

Medium 4.3 Published 16 Dec 2022 Updated 17 Apr 2025

A meeting participant can access private poll responses by subscribing to the current-poll collection, exposing sensitive voting data.

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2022-23490?

CVE-2022-23490 is a medium-severity missing authorization vulnerability in bigbluebutton, published on 16 Dec 2022. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

BigBlueButton is an open source web conferencing system. Versions prior to 2.4.0 expose sensitive information to Unauthorized Actors. This issue affects meetings with polls, where the attacker is a meeting participant. Subscribing to the current-poll collection does not update the client UI, but does give the attacker access to the contents of the collection, which include the individual poll responses. This issue is patched in version 2.4.0. There are no workarounds.

Weakness: CWE-863, CWE-200

Which versions are affected by CVE-2022-23490?

It affects 1 product.

Products include Bigbluebutton Bigbluebutton.

How do I fix CVE-2022-23490?

No fix has been published for CVE-2022-23490 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-2022-23490 being exploited?

There is no known exploitation of CVE-2022-23490 in the wild and no public exploit code.

Sources

Also known as GHSA-4qgc-xhw5-6qfg.