CVE-2025-55200
BaseFortify
Publication date: 2025-10-09
Last updated on: 2025-10-20
Assigner: GitHub, Inc.
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| bigbluebutton | bigbluebutton | to 3.0.13 (exc) |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| CWE-79 | The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
This vulnerability is a Stored Cross-Site Scripting (XSS) issue in BigBlueButton versions prior to 3.0.13. It occurs in the "Shared Notes" feature where the "Username" field input is not properly sanitized. A low-privileged user can input malicious JavaScript code as their username, which is then executed in the context of higher-privileged users (such as Admins) when they view the Shared Notes page.
How can this vulnerability impact me? :
The vulnerability allows a low-privileged user to execute arbitrary JavaScript code in the browsers of higher-privileged users. This can lead to unauthorized actions performed with the privileges of those users, potentially compromising sensitive data, hijacking user sessions, or performing administrative actions without permission.
What immediate steps should I take to mitigate this vulnerability?
Upgrade BigBlueButton to version 3.0.13 or later, as this version fixes the Stored Cross-Site Scripting (XSS) vulnerability in the Shared Notes feature.