Incorrect authorization in BigBlueButton - #VU150172
Published: September 16, 2026
Vulnerability identifier: #VU150172
CSH Severity: Medium
CVSS v4: 5.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N]
CVE-ID: N/A
CWE-ID: CWE-863
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to bypass authorization checks.
The vulnerability exists due to improper authorization of presentation uploads. A remote user can upload and convert a presentation into another meeting's presentation namespace to bypass meeting isolation.
Affected software
BigBlueButton
Remediation
Install updates from vendor's website.
BigBlueButton - addressed in versions 3.0.37, 4.0.0 rc.2