High 7.1Published Oct 9, 2025

CVE-2025-55200BigBlueButton vulnerable to Stored XSS via name of user at Shared Notes

Updated under an hour ago (Oct 27, 2026, 2:10 AM ET)

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No exploitation reported and no EPSS estimate yet.

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Every CVE for bigbluebutton

Exploited in the last 30 days

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.

CVSS: 7.1 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N
Weakness (CWE): CWE-79
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Analyzed
Record last updated: Oct 9, 2025
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

bigbluebutton bigbluebutton bigbluebutton:bigbluebutton (from the name)	before 3.0.13	CNA record
bigbluebutton bigbluebutton bigbluebutton:bigbluebutton	before 3.0.13	NVD

References

References

https://github.com/bigbluebutton/bigbluebutton/security/advisories/GHSA-9jv9-cjrm-grj2	x-refsource-confirm, vendor-advisory
https://github.com/bigbluebutton/bbb-pads/pull/67	x-refsource-misc, issue-tracking, product
https://github.com/bigbluebutton/bigbluebutton/pull/23693	x-refsource-misc, issue-tracking, patch
https://github.com/bigbluebutton/bbb-pads/releases/tag/v1.5.4	x-refsource-misc, release-notes

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.