What is CVE-2020-27608?

CVE-2020-27608 is a medium-severity vulnerability in Bigbluebutton, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2020-10-21.

How severe is CVE-2020-27608?

Medium severity. CVSS v3 base score is 6.1 out of 10.

XSS in Bigbluebutton

CVE-2020-27608

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.

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.008 (53.5th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

Affected products

Bigbluebutton
N/a — versions n/a

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

cve@mitre.org (Exploit, Third Party Advisory, x_refsource_MISC)

Frequently asked questions

What is CVE-2020-27608?: CVE-2020-27608 is a medium-severity vulnerability in Bigbluebutton, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2020-10-21.
How severe is CVE-2020-27608?: Medium severity. CVSS v3 base score is 6.1 out of 10.