Cross-site Scripting (XSS) Vulnerabilities in ATutor

Advisory ID:HTB22599
Vendor:Inclusive Design Institute
Vulnerable Versions:1.0 and probably prior
Tested Version:1.0
Advisory Publication:September 1, 2010 [without technical details]
Vendor Notification:September 1, 2010
Public Disclosure:September 15, 2010
Latest Update:September 9, 2010
Vulnerability Type:Cross-Site Scripting [CWE-79]
Risk Level:Low
CVSSv2 Base Score:2.6 (AV:N/AC:H/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 multiple vulnerabilities in ATutor which could be exploited to perform cross-site scripting attacks.

1) Cross-site scripting (XSS) vulnerability in ATutor
The vulnerability exists due to input sanitation error in the "cid" parameter in mods/_core/editor/edit_content_folder.php and mods/_core/editor/delete_content.php. A remote attacker can send a specially crafted HTTP POST request to the vulnerable script and execute arbitrary HTML and script code in user`s browser in context of the vulnerable website. Successful exploitation requires that victim is authorized. Successful exploitation requires that victim is logged-in into the application and has access to administrative interface.
Exploitation examples:
http://host/mods/_core/editor/edit_content_folder.php?cid=PAGE_ID"><script>a lert(document.cookie)</s cript>
http://host/mods/_core/editor/delete_content.php?cid=PAGE_ID"><scrip t>alert(document.cookie)</script >

How to Detect Cross-Site Scripting Vulnerabilities
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Install patch 07 to fix the problem.

[1] High-Tech Bridge Advisory HTB22599 - - Cross-site Scripting (XSS) Vulnerabilities in ATutor
[2] ATutor - - ATutor is a free Open Source Web-based eLearning environment designed with accessibility and adaptability in mind.
[3] Common Weakness Enumeration (CWE) - - targeted to developers and security practitioners, CWE is a formal list of software weakness types.
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