Bit 5 Blog 8.1 AddComment.PHP HTML Injection Vulnerability

ID: 48981
Download vulnerable application: None

Bit 5 Blog is prone to an HTML injection vulnerability. This issue is due to a failure in the application to properly sanitize user-supplied input before using it in dynamically generated content.

Attacker-supplied HTML and script code would be executed in the context of the affected Web site, potentially allowing for theft of cookie-based authentication credentials. An attacker could also exploit this issue to control how the site is rendered to the user; other attacks are also possible. 

The following proof of concept is available:
<a href=javascript:alert(123)>clickme</a>
1-4-2 (www01)