What’s Vulnerable › Vulnerabilities

CVE-2011-10033: WordPress Plugin is-human <= v1.4.2 Eval Injection RCE

• Severity: critical (CVSS 9.3 v4.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-10-15 · updated 2026-06-16
• Weakness: CWE-95

Description

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.

Affected products

• is-human WordPress Plugin: through 1.4.2

References

• https://web.archive.org/web/20120115212202/http://blog.spiderlabs.com/2012/01/honeypot-alert-is-human-wordpress-plugin-remote-command-execution-attack-detected.html
• https://wordpress.org/plugins/is-human/
• https://www.exploit-db.com/exploits/17299
• https://www.trustwave.com/en-us/resources/blogs/spiderlabs-blog/honeypot-alert-more-wordpress-is_human-plugin-remote-command-injection-attack-detected/
• https://www.vulncheck.com/advisories/wordpress-plugin-is-human-eval-injection-rce

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