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Reflected Cross-Site Scripting (XSS) in MODX Revolution

Advisory ID:HTB23229
Product:MODX Revolution
Vendor:MODX
Vulnerable Versions:2.3.1-pl and probably prior
Tested Version:2.3.1-pl
Advisory Publication:August 20, 2014 [without technical details]
Vendor Notification:August 20, 2014
Vendor Fix:September 11, 2014
Public Disclosure:September 17, 2014
Latest Update:September 16, 2014
Vulnerability Type:Cross-Site Scripting [CWE-79]
CVE Reference:CVE-2014-5451
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 Security Research Lab discovered vulnerability in MODX Revolution, which can be exploited to perform Cross-Site Scripting (XSS) attacks.


1) Reflected Cross-Site Scripting (XSS) in MODX Revolution: CVE-2014-5451

The vulnerability exists due to insufficient sanitization of input data passed via the "a" HTTP GET parameter to "/manager/" URL. A remote attacker can trick a logged-in administrator to open a specially crafted link and execute arbitrary HTML and script code in browser in context of the vulnerable website.
This vulnerability can be used against website administrator to perform phishing attacks, steal potentially sensitive data and gain complete control over web application.

The exploitation example below uses the "alert()" JavaScript function to display "immuniweb" word:

http://[host]/manager/?a=%22%20onload=%22javascript:alert%28/immuniweb/%29;% 22%3E


ImmuniWeb® On-Demand Web Application Penetration Test


Solution:
Update "manager/templates/default/header.tpl" file from GitHub.

More Information:
https://github.com/modxcms/revolution/issues/11966
https://github.com/modxcms/revolution/commit/e36f80f18e9514204bf2ce82747c8adf7e47a9c9


References:
[1] High-Tech Bridge Advisory HTB23229 - https://www.immuniweb.com/advisory/HTB23229 - Reflected Cross-Site Scripting (XSS) in MODX Revolution.
[2] MODX Revolution - http://modx.com - MODX Revolution is the web content management platform for those that truly care about no-compromise design and exceptional user experience. It gives you complete control over your site and content, with the flexibility and scalability to adapt to your changing needs.
[3] Common Vulnerabilities and Exposures (CVE) - http://cve.mitre.org/ - 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) - http://cwe.mitre.org - targeted to developers and security practitioners, CWE is a formal list of software weakness types.
[5] ImmuniWeb® - Leveraging the power of machine-learning and genius of human brain to deliver the most advanced web application security and penetration testing.
[6] ImmuniWeb® SSLScan - Test your servers for security and compliance with PCI DSS, HIPAA and NIST.
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