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gpEasy 3.5.2 Cross Site Scripting

gpEasy 3.5.2 Cross Site Scripting
Posted Jan 24, 2013
Authored by High-Tech Bridge SA | Site htbridge.com

gpEasy versions 3.5.2 and below suffer from a cross site scripting vulnerability.

tags | exploit, xss
advisories | CVE-2013-0807
MD5 | c22331a6cc52df895fadc443b693284f

gpEasy 3.5.2 Cross Site Scripting

Change Mirror Download
Advisory ID: HTB23137
Product: gpEasy
Vendor: gpeasy
Vulnerable Version(s): 3.5.2 and probably prior
Tested Version: 3.5.2
Vendor Notification: January 2, 2013
Vendor Patch: January 2, 2013
Public Disclosure: January 23, 2013
Vulnerability Type: Cross-Site Scripting [CWE-79]
CVE Reference: CVE-2013-0807
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 ( https://www.htbridge.com/advisory/ )

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Advisory Details:

High-Tech Bridge Security Research Lab discovered vulnerability in gpEasy, which can be exploited to perform Cross-Site Scripting (XSS) attacks.


1) Cross-Site Scripting (XSS) in gpEasy: CVE-2013-0807

The vulnerability exists due to insufficient sanitisation of user-supplied data in "section" HTTP GET parameter passed to "index.php" script. A remote attacker can trick logged-in administrator to open a specially crafted link and execute arbitrary HTML and script code in browser in context of the vulnerable website.

The exploitation example below uses the "alert()" JavaScript function to display administrator's cookies:

http://[host]/?cmd=new_section&section=%22%3E%3Cscript%3Ealert%28document.cookie%29;%3C/script%3E

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Solution:

Upgrade "include/tool/editing_page.php" script to the latest version from GitHub.

More Information:
https://github.com/oyejorge/gpEasy-CMS/commit/40f1b4a5749a621cd27c5ca39900dbcf8701969d

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References:

[1] High-Tech Bridge Advisory HTB23137 - https://www.htbridge.com/advisory/HTB23137 - Cross-Site Scripting (XSS) vulnerability in gpEasy.
[2] gpEasy - http://gpeasy.com - gpEasy is a complete and easy to use Content Management System written in PHP.
[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.

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Disclaimer: The information provided in this Advisory is provided "as is" and without any warranty of any kind. Details of this Advisory may be updated in order to provide as accurate information as possible. The latest version of the Advisory is available on web page [1] in the References.

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