CVE-2020-28953: Bigbluebutton

Medium severity, CVSS 4.3. EPSS: 0.7% chance of exploitation in the next 30 days.

In BigBlueButton before 2.2.29, a user can vote more than once in a single poll.

Affected products

• Bigbluebutton Bigbluebutton: before 2.2.29 (fixed in 2.2.29)

Published 2020-11-19. Last modified 2026-06-17.