CVE-2026-27737

CVE-2026-27737CVE-2026-27737

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.

Scoring

CVSS 6.5 ()
VectorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
Last modified2026-07-24
Sourced from NVD. Curated for EU compliance use cases by Adam Lundqvist, Founder at SQUR.