CVE-2021-4143: Bigbluebutton

Medium severity, CVSS 6.1. EPSS: 0.9% chance of exploitation in the next 30 days.

Cross-site Scripting (XSS) - Generic in GitHub repository bigbluebutton/bigbluebutton prior to 2.4.0.

Affected products

• Bigbluebutton Bigbluebutton: before 2.4.0 (fixed in 2.4.0)

Published 2022-01-19. Last modified 2026-06-17.