Is CVE-2025-55200 actively exploited?

CVE-2025-55200 has no public evidence of in-the-wild exploitation as of 2025-10-20.

What is the CVSS score for CVE-2025-55200?

CVE-2025-55200 has a CVSS score of 7.1 (HIGH severity). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N.

How do I patch CVE-2025-55200?

Patch guidance is available from bigbluebutton security advisories. CVEDatabase generates AI-assisted remediation guidance on demand for CVE-2025-55200.

Which products are affected by CVE-2025-55200?

1 product: bigbluebutton bigbluebutton.

Fix CVE-2025-55200 - HIGH bigbluebutton bigbluebutton

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.

CVSS Metrics

Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N
Attack Vector: network
Complexity: low
Privileges: low
User Action: none
Scope: unchanged
Confidentiality: high
Integrity: low
Availability: none
Weaknesses: CWE-79 · Cross-site Scripting (XSS)

Metadata

Primary Vendor: BIGBLUEBUTTON
Published: 10/9/2025
Last Modified: 10/20/2025
Source: NIST NVD
Note: Verify all details with official vendor sources before applying patches.

CVE-2025-55200

Description

CVSS Metrics

Metadata

Affected Products

Remediation Guidance

Executive Summary