XSS in Bigbluebutton
CVE-2022-31065
BigBlueButton is an open source web conferencing system. In affected versions an attacker can embed malicious JS in their username and have it executed on the victim's client. When a user receives a private chat from the attacker (whose username contains malicious JavaScript), the script gets executed. Additionally when the victim receives a notification that the attacker has left the session. This issue has been patched in version 2.4.8 and 2.5.0. There are no known workarounds for this issue.
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:L.
EPSS exploit prediction
EPSS: 0.008 (54.2th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 54th percentile — 54.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.008 · newest: 0.008 · change: +0.000
Affected products
- Bigbluebutton — versions 2.5, < 2.4.8, 2.3.0
Weakness classification (CWE)
References
- github.com/bigbluebutton/bigbluebutton/security/advisories/GHSA-8m2p-7qv3-qff7 (Patch, Third Party Advisory)
- github.com/bigbluebutton/bigbluebutton/pull/15087 (Patch, Third Party Advisory)
- github.com/bigbluebutton/bigbluebutton/pull/15090 (Patch, Third Party Advisory)
Frequently asked questions
- What is CVE-2022-31065?
- CVE-2022-31065 is a medium-severity vulnerability in Bigbluebutton, classified under Cross-site Scripting. CVSS score: 6.5/10. Published 2022-06-27.
- How severe is CVE-2022-31065?
- Medium severity. CVSS v3 base score is 6.5 out of 10.