Auth bypass in Bigbluebutton
CVE-2022-23490
BigBlueButton is an open source web conferencing system. Versions prior to 2.4.0 expose sensitive information to Unauthorized Actors. This issue affects meetings with polls, where the attacker is a meeting participant. Subscribing to the current-poll collection does not update the client UI, but does give the attacker access to the contents of the collection, which include the individual poll responses. This issue is patched in version 2.4.0. There are no workarounds.
Vulnerability class: Information Disclosure
Published · last modified .
CVSS v3 metric
CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N.
EPSS exploit prediction
EPSS: 0.005 (37.1th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 37th percentile — 37.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.005 · change: +0.000
Affected products
- Bigbluebutton — versions < 2.4.0
Weakness classification (CWE)
References
- github.com/bigbluebutton/bigbluebutton/security/advisories/GHSA-4qgc-xhw5-6qfg (Patch, Third Party Advisory)
- github.com/bigbluebutton/bigbluebutton/releases/tag/v2.4.0 (Third Party Advisory, Release Notes)
Frequently asked questions
- What is CVE-2022-23490?
- CVE-2022-23490 is a medium-severity vulnerability in Bigbluebutton, classified under Information Disclosure. CVSS score: 4.3/10. Published 2022-12-16.
- How severe is CVE-2022-23490?
- Medium severity. CVSS v3 base score is 4.3 out of 10.