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WordPress BackWPup 3.0.12 Cross Site Scripting

WordPress BackWPup 3.0.12 Cross Site Scripting
Posted Aug 22, 2013
Authored by High-Tech Bridge SA | Site htbridge.com

WordPress BackWPup plugin version 3.0.12 suffers from a cross site scripting vulnerability.

tags | exploit, xss
advisories | CVE-2013-4626
MD5 | f9ca684389d429a9847b51949a5a3b68

WordPress BackWPup 3.0.12 Cross Site Scripting

Change Mirror Download
Advisory ID: HTB23161
Product: BackWPup WordPress Plugin
Vendor: Inpsyde GmbH
Vulnerable Version(s): 3.0.12 and probably prior
Tested Version: 3.0.12
Vendor Notification: June 19, 2013
Vendor Patch: August 12, 2013
Public Disclosure: August 21, 2013
Vulnerability Type: Cross-Site Scripting [CWE-79]
CVE Reference: CVE-2013-4626
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 XSS vulnerability in BackWPup WordPress Plugin, which can be exploited to perform cross-site scripting attacks against administrator of vulnerable application.


1) Cross-Site Scripting (XSS) in BackWPup WordPress Plugin: CVE-2013-4626

The vulnerability exists due to insufficient filtration of user-supplied data in "tab" HTTP GET parameter passed to "/wp-admin/admin.php" script. 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.

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

http://[host]/wp-admin/admin.php?page=backwpupeditjob&tab=%22%3E%3Cscript%3Ealert%28document.cookie%29;%3C/script%3E


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Solution:

Upgrade to BackWPup 3.0.13

More Information:
http://wordpress.org/plugins/backwpup/changelog/

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References:

[1] High-Tech Bridge Advisory HTB23161 - https://www.htbridge.com/advisory/HTB23161 - Cross-Site Scripting (XSS) in BackWPup WordPress Plugin.
[2] BackWPup WordPress Plugin - http://wordpress.org/plugins/backwpup/ - BackWPup is the All-in-One backup solution for WordPress.
[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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