CVE-2026-27737 – BigBlueButton has Stored XSS in bbb-playback replay

CVE ID :CVE-2026-27737

Published : May 18, 2026, 10:16 p.m. | 43 minutes ago

Description :BigBlueButton is an open-source virtual classroom. In versions prior to 3.0.19, the recording playback (presentation format) was not sanitizing user’s input in public chat. This allowed for a malicious actor to craft and carry out a targeted XSS attack, activated on anyone replaying the recording. This issue has been fixed 3.0.19.

Severity: 6.5 | MEDIUM

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