Description
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.
Affected products
bigbluebutton: bigbluebutton
References4
- github.com/bigbluebutton/bigbluebutton/security/advisories/GHSA… Vendor Advisory
- github.com/bigbluebutton/bigbluebutton/pull/23693 Issue TrackingPatch
- github.com/bigbluebutton/bbb-pads/pull/67 Issue TrackingProduct
- github.com/bigbluebutton/bbb-pads/releases/tag/v1.5.4 Release Notes
Metrics
- CVSS 3.1
-
5.4
MEDIUM
Score source: NVD
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N - EPSS — exploit probability
- 0% percentile: 16 · as of 9 November 2026
- CWE
- CWE-79
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