Description
WordPress Plugin Ajax Contact Form is prone to a cross-site scripting vulnerability because it fails to properly sanitize user-supplied input. An attacker may leverage this issue to execute arbitrary script code in the browser of an unsuspecting user in the context of the affected site. This can allow the attacker to steal cookie-based authentication credentials and launch other attacks. WordPress Plugin Ajax Contact Form version 1.0 is vulnerable.
Remediation
Edit the source code to ensure that input is properly sanitised or disable the plugin until a fix is available
References
http://www.vapidlabs.com/wp/wp_advisory.php?v=1281
http://blog.portswigger.net/2007/03/exploiting-xss-in-post-requests.html
Related Vulnerabilities
WordPress Plugin Contact Form by Supsystic Cross-Site Scripting (1.7.19)
WordPress Plugin WP Statistics Cross-Site Scripting (8.3)
WordPress Plugin Translate WordPress-Google Language Translator Cross-Site Scripting (6.0.9)
WordPress Plugin Pricing Table by Supsystic Multiple Vulnerabilities (1.8.1)