CVE-2022-27238: Bigbluebutton

Medium severity, CVSS 5.4. EPSS: 0.5% chance of exploitation in the next 30 days.

BigBlueButton version 2.4.7 (or earlier) is vulnerable to stored Cross-Site Scripting (XSS) in the private chat functionality. A threat actor could inject JavaScript payload in his/her username. The payload gets executed in the browser of the victim each time the attacker sends a private message to the victim or when notification about the attacker leaving room is displayed.

Affected products

• Bigbluebutton Bigbluebutton: up to and including 2.4.7

Published 2022-06-24. Last modified 2026-06-17.