CVE-2023-42803: Bigbluebutton

High severity, CVSS 8.8. EPSS: 0.5% chance of exploitation in the next 30 days.

BigBlueButton is an open-source virtual classroom. BigBlueButton prior to version 2.6.0-beta.2 is vulnerable to unrestricted file upload, where the insertDocument API call does not validate the given file extension before saving the file, and does not remove it in case of validation failures. BigBlueButton 2.6.0-beta.2 contains a patch. There are no known workarounds.

Affected products

• Bigbluebutton Bigbluebutton: up to and including 2.5.18; version 2.6.0 only

Published 2023-10-30. Last modified 2026-06-17.