Medium severity · published Jun 28, 2024
CVE-2024-38518
bbb-web API additional parameters considered
4.6
CVSS
0.3%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:L
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
Required
Confidentiality
Low
Integrity
None
Availability
Low
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 23% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
BI
bigbluebutton · bigbluebutton
< 2.6.18; >= 2.7.0, < 2.7.8; >= 2.8.0, < 3.0.0-alpha.7 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2024-38518
CVE.org
https://www.cve.org/CVERecord?id=CVE-2024-38518
github.com
https://github.com/bigbluebutton/bigbluebutton/commit/a9d436accdcd26ea66bed9f391488ac128cd62d1
github.com
https://github.com/bigbluebutton/bigbluebutton/commit/ea6e9461dceae8fa593543d8c686f77bb8677e72
github.com
https://github.com/bigbluebutton/bigbluebutton/pull/20279
github.com
https://github.com/bigbluebutton/bigbluebutton/security/advisories/GHSA-4m48-49h7-f3c4
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