CVE-2025-55200

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

Published Oct 9, 2025 CVSS 3.1 · 7.1 High EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
CPEs cpe:2.3:a:bigbluebutton:bigbluebutton:*:*:*:*:*:*:*:*
Type Values Removed Values Added
First Time appeared Bigbluebutton
Bigbluebutton bigbluebutton
Vendors & Products Bigbluebutton
Bigbluebutton bigbluebutton
Type Values Removed Values Added
Metrics ssvc

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

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'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
GitHub_M
Published
Updated
Oct 9, 2025, 7:08 PM
Reserved
Aug 8, 2025, 9:55 PM
Status
Analyzed
Published
Oct 9, 2025, 7:15 PM
Modified
Oct 19, 2026, 4:10 PM