CVE-2020-27608

PoC —

CVSS 3.1

6.1 medium

EPSS

<1%p55

Published

Oct 21, 2020 (Oct 21, 2020)

Modified

Jun 17, 2026

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.

Vendors: bigbluebutton
Products: bigbluebutton
Weakness: CWE-79
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

NVD CVE.org GitHub PoCs EPSS (0.8%)

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