Vulnerability in Bigbluebutton

CVE-2024-38518

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.

Published · last modified .

CVSS v3 metric

CVSS v3 base score 4.6 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:L.

EPSS exploit prediction

EPSS: 0.003 (21.3th percentile), scored .

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 21st percentile — 21.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2024-38518: held from 0.003 to 0.003.

EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000

Affected products

  • Bigbluebutton — versions < 2.6.18, >= 2.7.0, < 2.7.8, >= 2.8.0, < 3.0.0-alpha.7

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2024-38518?
CVE-2024-38518 is a medium-severity vulnerability in Bigbluebutton, classified under Improper Access Control. CVSS score: 4.6/10. Published 2024-06-28.
How severe is CVE-2024-38518?
Medium severity. CVSS v3 base score is 4.6 out of 10.