Wagner Elias has discovered a vulnerability in the cformsII plugin for WordPress, which can be exploited by malicious people to conduct cross-site scripting attacks.
Input passed to the "rs" parameter in wp-content/plugins/cforms/lib_ajax.php is not properly sanitised before being returned to the user. This can be exploited to execute arbitrary HTML and script code in a user's browser session in context of an affected site.
The vulnerability is confirmed in version 11.5. Other versions may also be affected.
Solution: Upgrade to version 13.2.
Provided and/or discovered by: Wagner Elias, Conviso IT Security.
Original Advisory: http://www.conviso.com.br/security-advisory-cform-wordpress-plugin-v-11-cve-2010-3977/
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