BigBlueButton is an open-source virtual classroom. In versions prior to 3.0.13, the "Shared Notes" feature contains a Stored Cross-Site Scripting (XSS) vulnerability with the input location being the "Username" field and the output location on the "Shared Notes" page, when a user with a malicious username is editing content. This vulnerability allows a low-privileged user to execute arbitrary JavaScript in the context of higher-privileged users (e.g., Admins) who open the Shared Notes page. Version 3.0.13 fixes the issue.
Fix
Patch, vendor advisory and mitigation references on NVD 2
- https://github.com/bigbluebutton/bigbluebutton/pull/23693 Issue Tracking, Patch
- https://github.com/bigbluebutton/bigbluebutton/security/advisories/GHSA-9jv9-cjrm-grj2 Vendor Advisory
Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.
Change history 1
- First seenCVSS 5.4 · bigbluebuttonNVD modified 2026-10-19 16:10
Affected (CPE criteria) 1
cpe:2.3:a:bigbluebutton:bigbluebutton:*:*:*:*:*:*:*:*
References 4
- https://github.com/bigbluebutton/bbb-pads/pull/67 Issue Tracking, Product
- https://github.com/bigbluebutton/bbb-pads/releases/tag/v1.5.4 Release Notes
- https://github.com/bigbluebutton/bigbluebutton/pull/23693 Issue Tracking, Patch
- https://github.com/bigbluebutton/bigbluebutton/security/advisories/GHSA-9jv9-cjrm-grj2 Vendor Advisory