HTB23161: XSS in BackWPup WordPress Plugin

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    • #8566

      Advisory ID: HTB23161
      Product: BackWPup WordPress Plugin
      Vendor: Inpsyde GmbH
      Vulnerable Versions: 3.0.12 and probably prior
      Tested Version: 3.0.12
      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%3Ealert%28document.cookie% 29;%3C/script%3E

      Upgrade to BackWPup 3.0.13

      More Information:

      [1] High-Tech Bridge Advisory HTB23161 – – Cross-Site Scripting (XSS) in BackWPup WordPress Plugin.
      [2] BackWPup WordPress Plugin – – BackWPup is the All-in-One backup solution for WordPress.
      [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.

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