VYPR
Unrated severityNVD Advisory· Published Oct 9, 2025· Updated Oct 9, 2025

BigBlueButton vulnerable to Stored XSS via name of user at Shared Notes

CVE-2025-55200

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.

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Affected products

2

Patches

Vulnerability mechanics

References

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