CVE-2023-42804

BigBlueButton is an open-source virtual classroom. BigBlueButton prior to version 2.6.0-beta.1 has a path traversal vulnerability that allows an attacker with a valid starting folder path, to traverse and read other files without authentication, assuming the files have certain extensions (txt, swf, svg, png). In version 2.6.0-beta.1, input validation was added on the parameters being passed and dangerous characters are stripped. There are no known workarounds.

• CWE-22

• https://github.com/bigbluebutton/bigbluebutton/pull/15960Third Party Advisory
• https://github.com/bigbluebutton/bigbluebutton/security/advisories/GHSA-3qjg-229m-vq84Third Party Advisory
• https://github.com/bigbluebutton/bigbluebutton/pull/15960Third Party Advisory
• https://github.com/bigbluebutton/bigbluebutton/security/advisories/GHSA-3qjg-229m-vq84Third Party Advisory

Published

Oct 30, 2023

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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