Auth bypass in Bigbluebutton
CVE-2022-23488
BigBlueButton is an open source web conferencing system. Versions prior to 2.4-rc-6 are vulnerable to Insertion of Sensitive Information Into Sent Data. The moderators-only webcams lock setting is not enforced on the backend, which allows an attacker to subscribe to viewers' webcams, even when the lock setting is applied. (The required streamId was being sent to all users even with lock setting applied). This issue is fixed in version 2.4-rc-6. There are no workarounds.
Vulnerability class: Information Disclosure
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.006 (46.5th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 46th percentile — 46.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: +0.000
Affected products
- Bigbluebutton — versions < 2.4-rc-6, 2.4
Weakness classification (CWE)
References
- github.com/bigbluebutton/bigbluebutton/security/advisories/GHSA-j5g3-f74q-rvfq (Patch, Third Party Advisory)
- github.com/bigbluebutton/bigbluebutton/releases/tag/v2.4-rc-6 (Third Party Advisory, Release Notes)
Frequently asked questions
- What is CVE-2022-23488?
- CVE-2022-23488 is a medium-severity vulnerability in Bigbluebutton, classified under Information Disclosure. CVSS score: 6.5/10. Published 2022-12-17.
- How severe is CVE-2022-23488?
- Medium severity. CVSS v3 base score is 6.5 out of 10.