Milos Zivanovic has discovered multiple vulnerabilities in oBlog, which can be exploited by malicious people to conduct cross-site scripting, script insertion, and cross-site request forgery attacks.

1) Input passed to the "search" parameter in index.php 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.

2) Input passed via "commentName", "commentEmail", commentWeb", or "commentText" form field in article.php (when "aid" is set to a valid article id and "comment" is set to "new") is not properly sanitised before being used. 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 being viewed.

3) The application allows users to perform certain actions via HTTP requests without performing any validity checks to verify the requests. This can be exploited to e.g. to change administrative credentials, disable published content, or conduct script insertion attacks if a logged-in user visits a malicious web site.

Solution
Edit the source code to ensure that input is properly sanitised.
Further details available to Secunia VIM customers

Provided and/or discovered by
Milos Zivanovic

Changelog
Further details available to Secunia VIM customers

Original Advisory
http://packetstormsecurity.org/0912-exploits/oblog-xssxsrf.txt

Deep Links
Links available to Secunia VIM customers