XSS in Bigbluebutton Greenlight
CVE-2022-26497
BigBlueButton Greenlight 2.11.1 allows XSS. A threat actor could have a username containing a JavaScript payload. The payload gets executed in the browser of the victim in the "Share room access" dialog if the victim has shared access to the particular room with the attacker previously.
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.
EPSS exploit prediction
EPSS: 0.008 (56.5th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 57th percentile — 56.5% 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 Greenlight — versions 2.11.1
Weakness classification (CWE)
References
- github.com/bigbluebutton/greenlight/blob/master/app/assets/javascripts/room.js (Exploit, Third Party Advisory)
- www.mgm-sp.com/en/cve-2022-26497-bigbluebutton-greenlight-xss/ (Patch, Third Party Advisory)
- packetstormsecurity.com/files/172143/Shannon-Baseband-acfg-pcfg-SDP-Attribute-M…
Frequently asked questions
- What is CVE-2022-26497?
- CVE-2022-26497 is a medium-severity vulnerability in Bigbluebutton Greenlight, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2022-06-02.
- How severe is CVE-2022-26497?
- Medium severity. CVSS v3 base score is 5.4 out of 10.