CVE-2023-43798: Bigbluebutton

Medium severity, CVSS 5.4. EPSS: 0.4% chance of exploitation in the next 30 days.

BigBlueButton is an open-source virtual classroom. BigBlueButton prior to versions 2.6.12 and 2.7.0-rc.1 is vulnerable to Server-Side Request Forgery (SSRF). This issue is a bypass of CVE-2023-33176. A patch in versions 2.6.12 and 2.7.0-rc.1 disabled follow redirect at `httpclient.execute` since the software no longer has to follow it when using `finalUrl`. There are no known workarounds. We recommend upgrading to a patched version of BigBlueButton.

Affected products

• Bigbluebutton Bigbluebutton: before 2.6.12 (fixed in 2.6.12); version 2.7.0 only

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