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.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
bigbluebutton bigbluebutton
< 3.0.19affected
blindsidenetworks scalite
< 1.7.0affected
bigbluebutton bbb-playback
< 5.4.3affected
References
- https://github.com/bigbluebutton/bigbluebutton/security/advisories/GHSA-8vv7-vj94-q2pv ↗
- https://github.com/bigbluebutton/bbb-playback/commit/09e89bfe4ff8488b68c3ff040d3081e419dc89b1 ↗
- https://github.com/bigbluebutton/bigbluebutton/commit/69f45aa1b963dc7d80179d0155acc670aec5c4fc ↗
- https://github.com/bigbluebutton/bigbluebutton/releases/tag/v3.0.19 ↗
- https://github.com/blindsidenetworks/scalelite/releases/tag/v1.7.0 ↗