XSS in Bigbluebutton
CVE-2022-31064
BigBlueButton is an open source web conferencing system. Users in meetings with private chat enabled are vulnerable to a cross site scripting attack in affected versions. The attack occurs when the attacker (with xss in the name) starts a chat. in the victim's client the JavaScript will be executed. This issue has been addressed 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: 0.013 (68.6th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 69th percentile — 68.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.012 · newest: 0.013 · change: +0.000
Affected products
- Bigbluebutton — versions 2.5, < 2.4.8, 2.3.0
Weakness classification (CWE)
References
- github.com/bigbluebutton/bigbluebutton/pull/15090 (Patch, Third Party Advisory)
- github.com/bigbluebutton/bigbluebutton/security/advisories/GHSA-hwv2-5pf5-hr87 (Patch, Third Party Advisory)
- github.com/bigbluebutton/bigbluebutton/pull/15067 (Patch, Third Party Advisory, Release Notes)
- pentests.nl/pentest-blog/stored-xss-in-bigbluebutton/ (Exploit, Third Party Advisory)
- seclists.org/fulldisclosure/2022/Jun/52 (mailing-list, Exploit, Mailing List, Third Party Advisory)
- packetstormsecurity.com/files/167682/BigBlueButton-2.3-2.4.7-Cross-Site-Scripti… (Exploit, VDB Entry, Third Party Advisory)
Frequently asked questions
- What is CVE-2022-31064?
- CVE-2022-31064 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-2022-31064?
- Medium severity. CVSS v3 base score is 6.5 out of 10.