Description
BigBlueButton is an open source web conferencing system. Versions prior to 2.4.3 contain a whiteboard grace period that exists to handle delayed messages, but this grace period could be used by attackers to take actions in the few seconds after their access is revoked. The attacker must be a meeting participant. This issue is patched in version 2.4.3 an version 2.5-alpha-1
References (2)
Core 2
Core References
Patch, Release Notes, Third Party Advisory x_refsource_confirm
https://github.com/bigbluebutton/bigbluebutton/security/advisories/GHSA-v6p9-926c-6qfp
Release Notes, Third Party Advisory x_refsource_misc
https://github.com/bigbluebutton/bigbluebutton/releases/tag/v2.4.3
Scores
CVSS v3
2.7
EPSS
0.0042
EPSS Percentile
33.1%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:N
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
no
Technical Impact
partial
Details
CWE
CWE-281
Status
published
Products (1)
bigbluebutton/bigbluebutton
< 2.4.3
Published
Dec 16, 2022
Tracked Since
Feb 18, 2026