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Vulnerability of WordPress: privilege escalation via W3 Super Cache

Synthesis of the vulnerability 

An attacker can inject PHP code in W3 Super Cache of WordPress, in order to escalate his privileges.
Impacted software: WordPress Plugins ~ not comprehensive.
Severity of this computer vulnerability: 2/4.
Number of vulnerabilities in this bulletin: 2.
Creation date: 25/04/2013.
Références of this announce: BID-59470, BID-59473, BID-59493, CVE-2013-2009, CVE-2013-2011, VIGILANCE-VUL-12712.

Description of the vulnerability 

The W3 Super Cache plugin is used to optimize the page loading.

However, the mfunc and mclude macros can contain PHP code.

An attacker can therefore inject PHP code in W3 Super Cache of WordPress, in order to escalate his privileges.
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This cybersecurity weakness impacts software or systems such as WordPress Plugins ~ not comprehensive.

Our Vigil@nce team determined that the severity of this security vulnerability is medium.

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

This bulletin is about 2 vulnerabilities.

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

Solutions for this threat 

WordPress: WP Super Cache version 1.3.2.
WP Super Cache version 1.3.2 is fixed:
  http://wordpress.org/extend/plugins/wp-super-cache/
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