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CVE-2026-41126 | Mondoo Vulnerability Intelligence

Vulnerability IntelligenceCVE-2026-41126

CVE-2026-41126

MEDIUM4.3

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

Published Apr 21, 2026

Modified 2 days ago

Details

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

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

https://www.cve.org/CVERecord?id=CVE-2026-41126

CVSS Analysis

CVSS v3.1

4.3

Exploitability

Attack Vector

NetworkAV:N

Attack Complexity

LowAC:L

Privileges Required

NonePR:N

User Interaction

RequiredUI:R

Scope

Scope

UnchangedS:U

Impact

Confidentiality

LowC:L

Integrity

NoneI:N

Availability

NoneA:N

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

Weakness Type (CWE)

Input Validation

Ecosystems

Timeline

PublishedApr 21, 2026

ModifiedApr 22, 2026