CVE-2023-43797 BigBlueButton Stored Cross-site Scripting vulnerability at Guest Lobby
Attackers can execute arbitrary scripts in victim browsers via unsanitized guest lobby messages, potentially leading to session hijacking or data theft.
- 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-2023-43797?
CVE-2023-43797 is a medium-severity cross-site scripting vulnerability in bigbluebutton, published on 30 Oct 2023. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
BigBlueButton is an open-source virtual classroom. Prior to versions 2.6.11 and 2.7.0-beta.3, Guest Lobby was vulnerable to cross-site scripting when users wait to enter the meeting due to inserting unsanitized messages to the element using unsafe innerHTML. Text sanitizing was added for lobby messages starting in versions 2.6.11 and 2.7.0-beta.3. There are no known workarounds.
Weakness: CWE-79
Which versions are affected by CVE-2023-43797?
It affects 1 product.
Products include Bigbluebutton Bigbluebutton.
How do I fix CVE-2023-43797?
No fix has been published for CVE-2023-43797 yet. Limit exposure of the affected software until one is available.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2023-43797 being exploited?
There is no known exploitation of CVE-2023-43797 in the wild and no public exploit code.
Other vulnerabilities in bigbluebutton
Sources
Also known as GHSA-v6wg-q866-h73x.