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Reflected XSS in Role Scoper WordPress Plugin

Advisory ID:HTB23276
Product:Role Scoper WordPress plugin
Vendor:Kevin Behrens
Vulnerable Versions:1.3.66 and probably prior
Tested Version:1.3.66
Advisory Publication:October 29, 2015 [without technical details]
Vendor Notification:October 29, 2015
Vendor Fix:October 29, 2015
Public Disclosure:November 19, 2015
Vulnerability Type:Cross-Site Scripting [CWE-79]
CVE Reference:CVE-2015-8353
Risk Level:Medium
CVSSv2 Base Score:6.1 [CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/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 Cross-Site scripting vulnerability in a popular Role Scoper WordPress plugin, present on more than 10 000 websites.

The vulnerability can be exploited by anonymous attackers against website administrators. Successful attack may allow to steal administrator's cookies, credentials and browser history, modify web page content to perform phishing attacks, or even to perform drive-by-download attacks by injecting malware into website pages when the website administrator follows a specially crafted link with XSS exploit.

The vulnerability is caused by absence of filtration of input-data passed via the "object_name" HTTP GET parameter to "/wp-admin/admin.php" script, when "page" is set to value "rs-object_role_edit". A remote unauthenticated 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.

A simple exploit below will display JS popup with "ImmuniWeb" word:

http://[host]/wp-admin/admin.php?page=rs-object_role_edit&object_name=%27%22 %3E%3Cscript%3Ealert%28ImmuniWeb%29%3B%3C%2Fscript%3E

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Update to Role Scoper 1.3.67

More Information:

[1] High-Tech Bridge Advisory HTB23276 - - Reflected XSS in Role Scoper WordPress Plugin.
[2] Role Scoper Wordpress plugin - - CMS-like permissions for reading and editing. Content-specific restrictions and roles supplement/override WordPress roles.
[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.
[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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