What the vulnerability does
01Description
WordPress Plugin ultimate-member 2.1.3 contains a local file inclusion vulnerability that allows authenticated attackers to include arbitrary files by manipulating the pack parameter in class-admin-upgrade.php. Attackers can send POST requests with malicious pack values to include unintended PHP files from the packages directory and execute arbitrary code.
Explanation of Vulnerability in Simple Terms
02Summary
Ultimate Member versions 2.1.3 contain a local code execution vulnerability. An attacker with low-level site access can read sensitive files on the server. The vulnerability requires local system access and does not require user interaction. Site administrators should update to a version newer than 2.1.3.
What an attacker can do
03Attacker Capabilities
Read sensitive files on the server with low-level site privileges.
Potential impact on your site
04Site Impact
Sensitive server files may be exposed to users with low site privileges.
Conditions required to exploit
05Prerequisites
Attacker needs low-level site access; local system access required.
Key dates
06Disclosure timeline
May 13, 2026
CVE published
May 13, 2026
Record updated