What the vulnerability does
01Description
The WordPress plugin is-human <= v1.4.2 contains an eval injection vulnerability in /is-human/engine.php that can be triggered via the 'type' parameter when the 'action' parameter is set to 'log-reset'. The root cause is unsafe use of eval() on user-controlled input, which can lead to execution of attacker-supplied PHP and OS commands. This may result in arbitrary code execution as the webserver user, site compromise, or data exfiltration. The is-human plugin was made defunct in June 2008 and is no longer available for download. This vulnerability was exploited in the wild in March 2012.
Explanation of Vulnerability in Simple Terms
02Summary
The is-human WordPress plugin through version 1.4.2 contains a code injection vulnerability that allows unauthenticated attackers to execute arbitrary PHP code on the site. The plugin fails to properly validate or sanitize user input before processing it, enabling remote code execution without authentication or user interaction.
What an attacker can do
03Attacker Capabilities
Run arbitrary PHP code on the site and take complete control of it.
Potential impact on your site
04Site Impact
Complete compromise of the WordPress site, including data theft, malware installation, and defacement.
Conditions required to exploit
05Prerequisites
Network access to the site; no authentication or user interaction required.
Key dates
06Disclosure timeline
October 15, 2025
CVE published
May 15, 2026
Record updated
