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Vulnerability of Joomla Web Filemanager: Cross Site Scripting

Synthesis of the vulnerability 

An attacker can trigger a Cross Site Scripting of Joomla Web Filemanager, in order to run JavaScript code in the context of the web site.
Impacted software: Joomla Extensions ~ not comprehensive.
Severity of this computer vulnerability: 2/4.
Creation date: 29/04/2019.
Références of this announce: CVE-2018-18276, VIGILANCE-VUL-29152.

Description of the vulnerability 

An attacker can trigger a Cross Site Scripting of Joomla Web Filemanager, in order to run JavaScript code in the context of the web site.
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This threat bulletin impacts software or systems such as Joomla Extensions ~ not comprehensive.

Our Vigil@nce team determined that the severity of this computer threat bulletin is medium.

The trust level is of type confirmed by the editor, with an origin of document.

A proof of concept or an attack tool is available, so your teams have to process this alert. An attacker with a specialist ability can exploit this computer threat.

Solutions for this threat 

Joomla Web Filemanager: workaround.
A workaround is to disable Web Filemanager.

Wind River Linux: solution (21/05/2019).
The solution is indicated in information sources.
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Computer vulnerabilities tracking service 

Vigil@nce provides a network vulnerability note. The Vigil@nce vulnerability database contains several thousand vulnerabilities.