source: https://www.securityfocus.com/bid/36218/info

MKPortal is prone to multiple HTML-injection vulnerabilities because it fails to sufficiently sanitize user-supplied data.

Attacker-supplied HTML or JavaScript code could run in the context of the affected site, potentially allowing the attacker to steal cookie-based authentication credentials and to control how the site is rendered to the user; other attacks are also possible. 

The following example data is available:

[UttpRL=htttptp://example.com]example.com[/URL]
[IMttpG]htttptps://example.com/image.php?i=1&dateline=[/IMG]