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Cross-Site Scripting (XSS) in BackWPup WordPress Plugin

Advisory ID:HTB23161
Product:BackWPup WordPress Plugin
Vendor:Inpsyde GmbH
Vulnerable Versions:3.0.12 and probably prior
Tested Version:3.0.12
Advisory Publication:June 19, 2013 [without technical details]
Vendor Notification:June 19, 2013
Vendor Fix:August 12, 2013
Public Disclosure:August 21, 2013
Latest Update:August 13, 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
 

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%3Ealer t%28document.cookie%29;%3C/script%3E


ImmuniWeb® On-Demand Web Application Penetration Test


Solution:
Upgrade to BackWPup 3.0.13

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


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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