CVE-2025-55200
Unknown Unknown - Not Provided
BaseFortify

Publication date: 2025-10-09

Last updated on: 2025-10-20

Assigner: GitHub, Inc.

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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Meta Information
Published
2025-10-09
Last Modified
2025-10-20
Generated
2026-06-16
AI Q&A
2025-10-09
EPSS Evaluated
2026-06-15
NVD
CVE-2025-55200
EUVD
EUVD-2025-33584
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
bigbluebutton bigbluebutton to 3.0.13 (exc)
Helpful Resources
Exploitability
CWE
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KEV
KEV Icon
CWE ID Description
CWE-79 The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.
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Executive Summary

This vulnerability is a Stored Cross-Site Scripting (XSS) issue in BigBlueButton versions prior to 3.0.13. It occurs in the "Shared Notes" feature where the "Username" field input is not properly sanitized. A low-privileged user can input malicious JavaScript code as their username, which is then executed in the context of higher-privileged users (such as Admins) when they view the Shared Notes page.

Impact Analysis

The vulnerability allows a low-privileged user to execute arbitrary JavaScript code in the browsers of higher-privileged users. This can lead to unauthorized actions performed with the privileges of those users, potentially compromising sensitive data, hijacking user sessions, or performing administrative actions without permission.

Mitigation Strategies

Upgrade BigBlueButton to version 3.0.13 or later, as this version fixes the Stored Cross-Site Scripting (XSS) vulnerability in the Shared Notes feature.

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