Grace period for lock settings in public/private chats in BigBlueButton
13Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 4.3epss 0.8%
exploitation probability
0.8%top 47% of all CVEs
observed exploitation
nono source reports it
BigBlueButton is an open source web conferencing system. Starting in version 2.2 and prior to versions 2.3.18 and 2.4.1, an attacker could send messages to a locked chat within a grace period of 5s any lock setting in the meeting was changed. The attacker needs to be a participant in the meeting. Versions 2.3.18 and 2.4.1 contain a patch for this issue. There are currently no known workarounds.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Affected products
bigbluebutton · bigbluebuttonReferences
https://github.com/bigbluebutton/bigbluebutton/pull/13850https://github.com/bigbluebutton/bigbluebutton/pull/14265https://github.com/bigbluebutton/bigbluebutton/releases/tag/v2.3.18https://github.com/bigbluebutton/bigbluebutton/releases/tag/v2.4.1https://github.com/bigbluebutton/bigbluebutton/security/advisories/GHSA-36vc-c338-6xjv