phpList 2.10.18 Cross Site Scripting

`HTTPCS Advisory : HTTPCS25  
Product : phpList  
Version : 2.10.18  
Date : 2012-07-09  
Criticality level : Less Critical  
Description : A vulnerability has been discovered in phpList, which can be  
exploited by malicious people to conduct cross-site scripting attacks. Input  
passed via the 'footer' parameter to '/lists/admin/?page=send&id=1&tab=Content'  
is not properly sanitised before being returned to the user. This can be  
exploited to execute arbitrary HTML and script code in a user's browser session  
in context of an affected site.  
Page : /lists/admin/?page=send&id=1&tab=Content  
Variables : sendtest=Send Test Message&workaround_fck_bug=1&save=Save Message as  
Draft&id=1&expand=0&footer=[VulnHTTPCS]  
Type : XSS  
Method : POST  
Solution :  
References : https://www.httpcs.com/advisory/httpcs25  
Credit : HTTPCS [Web Vulnerability Scanner]  
`