Vigil@nce - WordPress: Cross Site Scripting via MediaElement Flash Fallback
March 2018 by Vigil@nce
This bulletin was written by Vigil@nce : https://vigilance.fr/offer
SYNTHESIS OF THE VULNERABILITY
An attacker can trigger a Cross Site Scripting via MediaElement
Flash Fallback of WordPress, in order to run JavaScript code in
the context of the web site.
Impacted products: WordPress Core.
Severity: 2/4.
Creation date: 17/01/2018.
DESCRIPTION OF THE VULNERABILITY
The WordPress product offers a web service.
However, it does not filter received data via MediaElement Flash
Fallback before inserting them in generated HTML documents.
An attacker can therefore trigger a Cross Site Scripting via
MediaElement Flash Fallback of WordPress, in order to run
JavaScript code in the context of the web site.
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