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Cross-site Scripting (XSS) Vulnerabilities in XOOPS

Advisory ID:HTB23042
Vulnerable Versions:2.5.1.a and probably prior
Tested Version:2.5.1.a
Advisory Publication:August 24, 2011 [without technical details]
Vendor Notification:August 24, 2011
Public Disclosure:October 1, 2011
Latest Update:October 5, 2011
Vulnerability Type:Cross-Site Scripting [CWE-79]
Cross-Site Scripting [CWE-79]
CVE Reference:CVE-2011-4565
Risk Level:Medium
CVSSv2 Base Scores:4.3 (AV:N/AC:M/Au:N/C:N/I:P/A:N)
5 (AV:N/AC:L/Au:N/C:N/I:P/A:N)
Solution Status:Fixed by Vendor
Discovered and Provided:High-Tech Bridge Security Research Lab

Advisory Details:

High-Tech Bridge SA Security Research Lab has discovered vulnerabilities in XOOPS which could be exploited to perform cross-site scripting and script insertion attacks.

1) Cross-site scripting (XSS) vulnerabilities in XOOPS: CVE-2011-4565
The vulnerability exists due to input sanitation error in the "text" parameter in include/formdhtmltextarea_preview.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:
<form method="POST" action="http://HOST/include/formdhtmltextarea_preview.php">
<input type="hidden" name="html" value="1">
<input type="hidden" name="text" value="<script>alert(document.cookie)</script>">
<input type="submit">

2) Script insertion vulnerability in XOOPS: CVE-2011-4565
Input passed to the "[img]" BBCode tag is not properly sanitized. A remote attacker can insert arbitrary HTML and script code, which will be executed in user`s browser in context of the vulnerable website when user clicks on a specially inserted image.
Exploitation example:
[img width=300]");alert(document.cookie);//[ /img]

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[1] High-Tech Bridge Advisory HTB23042 - - Cross-site Scripting (XSS) Vulnerabilities in XOOPS
[2] XOOPS - - XOOPS is easy to use dynamic web content management system written in PHP
[3] Common Vulnerabilities and Exposures (CVE) - - international in scope and free for public use, CVE® is a dictionary of publicly known information security vulnerabilities and exposures.
[4] Common Weakness Enumeration (CWE) - - targeted to developers and security practitioners, CWE is a formal list of software weakness types.
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