CVE-2025-55200

Name: CVE-2025-55200
Creator: NVD / NIST
Published: 2025-10-09T19:15:43.663+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.4/10EPSS 0.22%

Last modified Jun 17, 2026

CVE-2025-55200 is a medium-severity vulnerability rated 5.4/10 on the CVSS scale. 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. EPSS estimates a 0.22% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

5.4/10

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

EPSS Probability

0.22%

12.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-79

Affected Software

Vendor	Product	Versions
Bigbluebutton	Bigbluebutton	< 3.0.13

References

https://github.com/bigbluebutton/bbb-pads/pull/67Issue Tracking, Product
https://github.com/bigbluebutton/bbb-pads/releases/tag/v1.5.4Release Notes
https://github.com/bigbluebutton/bigbluebutton/pull/23693Issue Tracking, Patch
https://github.com/bigbluebutton/bigbluebutton/security/advisories/GHSA-9jv9-cjrm-grj2Vendor Advisory

Timeline

Published: Oct 9, 2025
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2025-55200?

How severe is CVE-2025-55200?

CVE-2025-55200 has a CVSS score of 5.4/10 (MEDIUM severity). The EPSS model estimates a 0.22% probability of exploitation in the next 30 days.

How do I fix CVE-2025-55200?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2025-55200?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST