CVE-2026-27737 — BigBlueButton has Stored XSS in bbb-playback replay
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…
Published: 2026-05-18 · CVSS: 6.5 · CVSS 3.1
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7