WordPress BackWPup 3.0.12 Cross Site Scripting

2013.08.22
Risk: Low
Local: No
Remote: Yes
CWE: CWE-79


CVSS Base Score: 4.3/10
Impact Subscore: 2.9/10
Exploitability Subscore: 8.6/10
Exploit range: Remote
Attack complexity: Medium
Authentication: No required
Confidentiality impact: None
Integrity impact: Partial
Availability impact: None

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/ ) ----------------------------------------------------------------------------------------------- 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 ----------------------------------------------------------------------------------------------- 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. ----------------------------------------------------------------------------------------------- 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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