Charlie Eriksen has discovered a vulnerability in the Crayon Syntax Highlighter plugin for WordPress, which can be exploited by malicious people to compromise a vulnerable system. Input passed to the “wp_load” parameter in wp-content/plugins/crayon-syntax-hightlighter/util/ajax.php and wp-content/plugins/crayon-syntax-hightlighter/util/preview.php is not properly verified before being used to include files. This can be exploited to include arbitrary PHP files from external FTP resources.

The vulnerability is confirmed in version Crayon Syntax Highlighter Plugin version 1.12.1. Prior versions may also be affected.

wp_load Remote File Inclusion Vulnerability solution

Update to version 1.13.

Provided and/or discovered by

Charlie Eriksen via Secunia

Original Advisory

Charlie: (fixed link, which is broken in the Secunia advisory)

Secunia Advisory