CVE-2026-41126

MEDIUM

BigBlueButton has Open Redirect through bigbluebutton/api/join via get-parameter "logoutURL"

Title source: cna

Description

BigBlueButton is an open-source virtual classroom. Versions prior to 3.0.24 have an Open Redirect through bigbluebutton/api/join via get-parameter "logoutURL." Version 3.0.24 has adjusted the handling of requests with incorrect checksum so that the default logoutURL is used. No known workarounds are available.

References (1)

Core 1

Core References

X_Refsource_Confirm x_refsource_confirm

https://github.com/bigbluebutton/bigbluebutton/security/advisories/GHSA-cvwj-4pcp-f3g8

Scores

CVSS v3 4.3

EPSS 0.0023

EPSS Percentile 13.7%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N

CISA SSVC

Vulnrichment

Exploitation none

Automatable no

Technical Impact partial

Details

CWE

CWE-601

Status published

Products (1)

bigbluebutton/bigbluebutton < 3.0.24

Published Apr 22, 2026

Tracked Since Apr 22, 2026