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

How to Detect Cross-Site Scripting Vulnerabilities
Website Security Test
  • GDPR & PCI DSS Test
  • Website CMS Security Test
  • CSP & HTTP Headers Check
  • WordPress & Drupal Scanning
Try For Free

Solution:
Upgrade to BackWPup 3.0.13

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


References:
[1] High-Tech Bridge Advisory HTB23161 - https://www.immuniweb.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.

Have additional information to submit?
Please feel free to send us any additional information related to this Advisory, such as vulnerable versions, additional exploitation details and conditions, patches and other relevant details.
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