Description
BigBlueButton is an open-source virtual classroom designed to help teachers teach and learners learn. An attacker with a valid join link to a meeting can trick BigBlueButton into generating a signed join link with additional parameters. One of those parameters may be "role=moderator", allowing an attacker to join a meeting as moderator using a join link that was originally created for viewer access. This vulnerability has been patched in version(s) 2.6.18, 2.7.8 and 3.0.0-alpha.7.
References (4)
Core 4
Core References
Issue Tracking x_refsource_misc
https://github.com/bigbluebutton/bigbluebutton/pull/20279
Vendor Advisory x_refsource_confirm
https://github.com/bigbluebutton/bigbluebutton/security/advisories/GHSA-4m48-49h7-f3c4
Scores
CVSS v3
4.6
EPSS
0.0009
EPSS Percentile
25.6%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:L
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
no
Technical Impact
partial
Details
CWE
CWE-284
Status
published
Products (3)
bigbluebutton/bigbluebutton
< 2.6.18
bigbluebutton/bigbluebutton
>= 2.7.0, < 2.7.8
bigbluebutton/bigbluebutton
>= 2.8.0, < 3.0.0-alpha.7
Published
Jun 28, 2024
Tracked Since
Feb 18, 2026