Improper access control in BigBlueButton - CVE-2022-29234
Published: June 1, 2022 / Updated: May 14, 2026
Vulnerability identifier: #VU131449
CSH Severity: Low
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: CVE-2022-29234
CWE-ID: CWE-284
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to bypass chat lock restrictions.
The vulnerability exists due to improper access control in public/private chat lock enforcement when lock settings are changed during a meeting. A remote user can send messages within the 5-second grace period to bypass chat lock restrictions.
The issue affects participants in the meeting and is limited to a 5-second window after a lock setting change.
Affected software
BigBlueButton
How to mitigate CVE-2022-29234
Install security update from vendor's website.
BigBlueButton - addressed in versions 2.3.18, 2.4.1