6.1

CVE-2026-27736

BigBlueButton has Open Redirect vulnerability in ApiController

Open Redirect vulnerability in ApiController

BigBlueButton is an open-source virtual classroom. In versions on the 3.x branch prior to 3.0.20, the string received with errorRedirectUrl lacks validation, using it directly in the respondWithRedirect function leads to an Open Redirect vulnerability. BigBlueButton 3.0.20 patches the issue. No known workarounds are available.
Mögliche Gegenmaßnahme
Server: There are no workarounds. We recommend upgrading to a patched version of BigBlueButton.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
BigBlueButton ≫ BigBlueButton Version < 3.0.20
VulnDex Vulnerability Enrichment
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Weitere Schwachstelleninformationen
SystemBigBlueButton
≫
Produkt Server
Version >= 0.0.0, < 2.7.x
Version >= 3.0.0, < 3.0.20
Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.15% 0.042
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
security-advisories@github.com 6.1 2.8 2.7
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
CWE-601 URL Redirection to Untrusted Site ('Open Redirect')

The web application accepts a user-controlled input that specifies a link to an external site, and uses that link in a redirect.

https://github.com/bigbluebutton/bigbluebutton/security/advisories/GHSA-65cv-rg9f-qqrx
Patch
Vendor Advisory
https://github.com/bigbluebutton/bigbluebutton/commit/691f92f3af0d6b796b91cb968977068663119812
Patch
https://github.com/bigbluebutton/bigbluebutton/security/advisories/GHSA-65cv-rg9f-qqrx
Third Party Advisory