CVE-2022-29236

MEDIUM

BigBlueButton <2.3.18, <2.4-rc-6 - Privilege Escalation

Title source: llm
STIX 2.1

Description

BigBlueButton is an open source web conferencing system. Starting in version 2.2 and prior to versions 2.3.18 and 2.4-rc-6, an attacker can circumvent access restrictions for drawing on the whiteboard. The permission check is inadvertently skipped on the server, due to a previously introduced grace period. The attacker must be a meeting participant. The problem has been patched in versions 2.3.18 and 2.4-rc-6. There are currently no known workarounds.

References (5)

Core 5
Core References
Patch, Third Party Advisory x_refsource_misc
https://github.com/bigbluebutton/bigbluebutton/pull/13803
Patch, Third Party Advisory x_refsource_misc
https://github.com/bigbluebutton/bigbluebutton/pull/14265
Release Notes, Third Party Advisory x_refsource_misc
https://github.com/bigbluebutton/bigbluebutton/releases/tag/v2.3.18
Release Notes, Third Party Advisory x_refsource_misc
https://github.com/bigbluebutton/bigbluebutton/releases/tag/v2.4-rc-6

Scores

CVSS v3 4.3
EPSS 0.0081
EPSS Percentile 52.1%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

Details

CWE
CWE-285
Status published
Products (2)
bigbluebutton/bigbluebutton 2.4 alpha1 (10 CPE variants)
bigbluebutton/bigbluebutton 2.2.0 - 2.3.18
Published Jun 02, 2022
Tracked Since Feb 18, 2026