Vulnerability Description
In BigBlueButton before 2.2.28 (or earlier), uploaded presentations are sent to clients without a Content-Type header, which allows XSS, as demonstrated by a .png file extension for an HTML document.
CVSS Score
6.1
MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Bigbluebutton | Bigbluebutton | < 2.2.28 |
Related Weaknesses (CWE)
References
- https://www.golem.de/news/big-blue-button-das-grosse-blaue-sicherheitsrisiko-201ExploitThird Party Advisory
- https://www.golem.de/news/big-blue-button-das-grosse-blaue-sicherheitsrisiko-201ExploitThird Party Advisory
FAQ
What is CVE-2020-27608?
CVE-2020-27608 is a vulnerability with a CVSS score of 6.1 (MEDIUM). In BigBlueButton before 2.2.28 (or earlier), uploaded presentations are sent to clients without a Content-Type header, which allows XSS, as demonstrated by a .png file extension for an HTML document.
How severe is CVE-2020-27608?
CVE-2020-27608 has been rated MEDIUM with a CVSS base score of 6.1/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2020-27608?
Check the references section above for vendor advisories and patch information. Affected products include: Bigbluebutton Bigbluebutton.