Secunia

SoulBlack Security Research has reported a vulnerability in the Guestbook PRO module for WebAPP, which can be exploited by malicious people to conduct script insertion attacks.

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

The vulnerability has been reported in version 3.2.1. Other versions may also be affected.

Solution
Edit the source code to ensure that input is properly sanitised.

Provided and/or discovered by
SoulBlack Security Research

Changelog
Further details available in Customer Area

Original Advisory
http://www.soulblack.com.ar/repo/papers/guesbookpro_advisory.txt

Deep Links
Links available in Customer Area