CVE-2026-27737

6.5 Moyenne

Publiée le 19/05/2026 à 00:16 · Modifiée le 24/07/2026 à 15:10 · Analyse NVD reportée · Source : security-advisories@github.com

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.

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Produits concernés

bigbluebutton
blindsidenetworks scalite
bigbluebutton bbb-playback

Scores CVSS

Version	Score	Source	Vecteur
3.1	6.5 Moyenne	security-advisories@github.com	`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N`

Faiblesses (CWE)

CWE-79

Références

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/bigbluebutton/bigbluebutton/security/advisories/GHSA-8vv7-vj94-q2pv
https://github.com/blindsidenetworks/scalelite/releases/tag/v1.7.0

Ailleurs

NVD
CVE.org
CIRCL Vulnerability-Lookup
CERT-FR
GitHub Advisories