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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Fixes

Solution

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Workaround

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History

Thu, 09 Oct 2025 19:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Thu, 09 Oct 2025 19:00:00 +0000

Type Values Removed Values Added
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.
Title BigBlueButton vulnerable to Stored XSS via name of user at Shared Notes
Weaknesses CWE-79
References
Metrics cvssV3_1

{'score': 7.1, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N'}


cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2025-10-09T19:08:17.415Z

Reserved: 2025-08-08T21:55:07.965Z

Link: CVE-2025-55200

cve-icon Vulnrichment

Updated: 2025-10-09T19:08:14.974Z

cve-icon NVD

Status : Received

Published: 2025-10-09T19:15:43.663

Modified: 2025-10-09T19:15:43.663

Link: CVE-2025-55200

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.