CVE-2025-55200

MEDIUM EPSS 12.6%
Published Oct 9, 20258mo ago · Modified Jun 17, 20262w ago
5.4 CVSS 3.1
Medium
Find Similar
Published Oct 9, 2025 8mo ago
Last Modified Jun 17, 2026 2w ago

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 Details

Base Score
5.4
Exploitability
2.3
Impact
2.7
Vector string
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Attack Vector Network
Attack Complexity Low
Privileges Required Low
User Interaction Required
Scope Changed
Confidentiality Low
Integrity Low
Availability None

Threat Intelligence

EPSS Exploit Probability
12.6% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-79 Cross-site Scripting Injection

Affected Products 1

VendorProductVersionRange
bigbluebuttonbigbluebutton* <3.0.13

References 4

  • github.com https://github.com/bigbluebutton/bbb-pads/pull/67
    Issue TrackingProduct
  • github.com https://github.com/bigbluebutton/bbb-pads/releases/tag/v1.5.4
    Release Notes
  • github.com https://github.com/bigbluebutton/bigbluebutton/pull/23693
    Issue TrackingPatch
  • github.com https://github.com/bigbluebutton/bigbluebutton/security/advisories/GHSA-9jv9-cjrm-grj2
    Vendor Advisory

Remediation

  • github.com https://github.com/bigbluebutton/bigbluebutton/pull/23693
    Issue TrackingPatch