VULNERABILITY INTELLIGENCE

CVE-2025-55200

CVSS score7.1 HIGH

EPSS probability0.25%

CISA KEVNot currently listed

Published2025-10-09

Last modified2026-10-19

CVSS vectorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N

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.

Weakness classification

security-advisories@github.com: CWE-79

Primary references

security-advisories@github.com — Issue Tracking, Product
security-advisories@github.com — Release Notes
security-advisories@github.com — Issue Tracking, Patch
security-advisories@github.com — Vendor Advisory