Multiple vulnerabilities have been reported in Post Revolution, which can be exploited by malicious people to conduct script insertion attacks, disclose sensitive information, and compromise a vulnerable system.

1) Input passed to the "dir" parameter in common.php and themes/default/preview_post_completo.php is not properly verified before being used to include files. This can be exploited to include arbitrary files from local or external resources.

Successful exploitation of this vulnerability requires that "register_globals" is enabled.

2) Input passed to a comment is not properly sanitised before being used to display the comment. This can be exploited to insert arbitrary HTML and script code, which will be executed in a user's browser session in context of an affected site when the malicious data is viewed.

Vulnerability #1 is confirmed in version 0.6.6 and vulnerability #2 is reported in version 0.6.6. Other versions may also be affected.

Solution
The vulnerabilities are fixed in version 0.8.0c-2.

Provided and/or discovered by
1) InyeXion
2) Javier Bassi

Changelog
Further details available to Secunia VIM customers

Original Advisory
Post Revolution:
http://postrev.com.ar/verpost.php?id_noticia=48
http://postrev.com.ar/verpost.php?id_noticia=49
http://postrev.com.ar/verpost.php?id_noticia=59

Javier Bassi:
http://javierb.com.ar/2011/06/01/postrev-vunls/

Deep Links
Links available to Secunia VIM customers