NBBN has discovered some vulnerabilities in the WP-Footnotes plugin for WordPress, which can be exploited by malicious people to conduct cross-site scripting attacks.
Input passed to the "pre_footnotes", "priority", "post_footnotes", and "style_rules" array elements in the "wp_footnotes_current_settings" array in the admin_panel.php script 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.
Successful exploitation requires that "register_globals" is enabled.
The vulnerabilities are confirmed in version 2.2. Other versions may also be affected.
Solution: Edit the source code to ensure that input is properly sanitised.
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