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Cross-site Scripting (XSS) Vulnerability in Spitfire

Advisory ID:HTB22903
Product:Spitfire CMS
Vulnerable Versions:1.0.436 and probably prior
Tested Version:1.0.436
Advisory Publication:March 15, 2011 [without technical details]
Vendor Notification:March 15, 2011
Public Disclosure:March 29, 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 Spitfire which could be exploited to perform cross-site scripting attacks.

1) Cross-site scripting (XSS) vulnerability in Spitfire
The vulnerability exists due to input sanitation error in the " cms_username " cookie in index.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:
GET / HTTP/1.1
Cookie: cms_username=admin"><script>alert("XSS")%3b</script>

ImmuniWeb® On-Demand Web Application Penetration Test

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.

[1] High-Tech Bridge Advisory HTB22903 - - Cross-site Scripting (XSS) Vulnerability in Spitfire
[2] Spitfire - - Spitfire is a light weight, easy to manage and extremely flexible open source PHP CMS.
[3] Common Weakness Enumeration (CWE) - - targeted to developers and security practitioners, CWE is a formal list of software weakness types.
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