Description
BigBlueButton is an open source web conferencing system. In BigBlueButton starting with 2.2 but before 2.3.18 and 2.4-rc-1, an attacker can circumvent access controls to gain access to all breakout rooms of the meeting they are in. The permission checks rely on knowledge of internal ids rather than on verification of the role of the user. Versions 2.3.18 and 2.4-rc-1 contain a patch for this issue. There are currently no known workarounds.
References (5)
Core 5
Core References
Patch, Third Party Advisory x_refsource_confirm
https://github.com/bigbluebutton/bigbluebutton/security/advisories/GHSA-3mr9-p9gw-cf33
Patch, Third Party Advisory x_refsource_misc
https://github.com/bigbluebutton/bigbluebutton/pull/13117
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-1
Scores
CVSS v3
4.3
EPSS
0.0096
EPSS Percentile
56.9%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
no
Technical Impact
partial
Details
CWE
CWE-285
Status
published
Products (2)
bigbluebutton/bigbluebutton
2.4 alpha1 (6 CPE variants)
bigbluebutton/bigbluebutton
2.2.0 - 2.3.18
Published
Jun 02, 2022
Tracked Since
Feb 18, 2026