CVE-2025-55200

7.1 HIGH
Published: October 09, 2025 Modified: October 20, 2025

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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CVSS v3.x Details

0.0 Low Medium High Critical 10.0
Vector String
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N

References to Advisories, Solutions, and Tools

Patch Vendor Advisory Exploit Third Party Advisory
https://github.com/bigbluebutton/bbb-pads/pull/67
Source: security-advisories@github.com
Issue Tracking Product
https://github.com/bigbluebutton/bbb-pads/releases/tag/v1.5.4
Source: security-advisories@github.com
Release Notes
https://github.com/bigbluebutton/bigbluebutton/pull/23693
Source: security-advisories@github.com
Issue Tracking Patch

4 reference(s) from NVD

Quick Stats

CVSS v3 Score
7.1 / 10.0
EPSS (Exploit Probability)
0.0%
13th percentile
Exploitation Status
Not in CISA KEV

Weaknesses (CWE)

Affected Vendors

bigbluebutton