Description
BigBlueButton is an open-source virtual classroom. Prior to 3.0.23, the presentation URL validation did not properly restrict access to site local and link local addresses. The redirect following logic now pins resolved IPs. This issue is fixed in version 3.0.23.
References (2)
Core 2
Core References
X_Refsource_Confirm x_refsource_confirm
https://github.com/bigbluebutton/bigbluebutton/security/advisories/GHSA-xqm3-6q7q-4v5h
X_Refsource_Misc x_refsource_misc
https://github.com/bigbluebutton/bigbluebutton/commit/7ccc60c965d744d9fb637715052352a1e59a2c27
Scores
CVSS v3
6.8
EPSS
0.0026
EPSS Percentile
17.3%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:N/A:N
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
no
Technical Impact
partial
Details
CWE
CWE-918
Status
published
Products (1)
bigbluebutton/bigbluebutton
< 3.0.23
Published
Jul 16, 2026
Tracked Since
Jul 17, 2026