CVSS base score
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
What the vulnerability does
The Advanced Custom Fields: Extended plugin for WordPress is vulnerable to Remote Code Execution in versions 0.9.0.5 through 0.9.1.1 via the prepare_form() function. This is due to the function accepting user input and then passing that through call_user_func_array(). This makes it possible for unauthenticated attackers to execute arbitrary code on the server, which can be leveraged to inject backdoors or create new administrative user accounts.
Explanation of Vulnerability in Simple Terms
Advanced Custom Fields: Extended versions 0.9.0.5 through 0.9.1.1 contain a code injection vulnerability that allows unauthenticated attackers to run arbitrary PHP code on the site without user interaction. The vulnerability stems from insufficient input validation in the plugin's field processing logic. An attacker can exploit this remotely over the network to gain full control of the WordPress installation.
What an attacker can do
Run arbitrary PHP code on your site and take complete control of it.
Potential impact on your site
Complete site compromise: attackers can steal data, modify content, install malware, or delete everything.
Conditions required to exploit
Network access only; no authentication or user interaction required.
Key dates
External resources
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