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BigBlueButton version 2.4.7 (or earlier) is vulnerable to stored Cross-Site Scripting (XSS) in the private chat functionality. A threat actor could inject JavaScript payload in his/her username. The payload gets executed in the browser of the victim each time the attacker sends a private message to the victim or when notification about the attacker leaving room is displayed.
Cite this page
CVE-2022-27238. CVEDatabase.com. Retrieved 1 May 2026. https://cvedatabase.com/cve/CVE-2022-27238
Use CWE-79, Bigbluebutton vendor hub and Bigbluebutton product page to widen CVE-2022-27238 into its surrounding weakness, vendor, and product context.
Compare it with CVE-2025-61602, CVE-2025-61601 and CVE-2026-27466 for nearby disclosures in the same product family.