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Cross-site Scripting (XSS) Vulnerability in Happy Chat

Advisory ID:HTB23001
Product:Happy Chat
Vendor:TuttoPhp
Vulnerable Versions:1.0 and probably prior
Tested Version:1.0
Advisory Publication:May 17, 2011 [without technical details]
Vendor Notification:May 17, 2011
Public Disclosure:May 31, 2011
Vulnerability Type:Cross-Site Scripting [CWE-79]
Risk Level:Medium
CVSSv2 Base Score:4.3 (AV:N/AC:M/Au:N/C:N/I:P/A:N)
Discovered and Provided:High-Tech Bridge Security Research Lab
 

Advisory Details:

High-Tech Bridge SA Security Research Lab has discovered vulnerability in Happy Chat which could be exploited to perform cross-site scripting attacks.

1) Cross-site scripting (XSS) vulnerability in Happy Chat
The vulnerability exists due to input sanitation error in the "nick" parameter in profilo.php. A remote attacker can send a specially crafted HTTP request to the vulnerable script and execute arbitrary HTML and script code in user`s browser in context of the vulnerable website.
Exploitation example:
http://[host]/profilo.php?nick=%22%3E%3Cscript%3Ealert%28document.cookie%29; %3C/script%3E


ImmuniWeb® On-Demand Web Application Penetration Test


Solution:
Currently we are not aware of any vendor-supplied patches or other solutions. The vendor was contacted in accordance to our Vendor Notification Policy but we didn't get any answer or feedback.


References:
[1] High-Tech Bridge Advisory HTB23001 - https://www.immuniweb.com/advisory/HTB23001 - Cross-site Scripting (XSS) Vulnerability in Happy Chat
[2] Happy Chat - tuttophp.altervista.org - Happy Chat is an online chat system.
[3] Common Weakness Enumeration (CWE) - http://cwe.mitre.org - targeted to developers and security practitioners, CWE is a formal list of software weakness types.
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