Description
WordPress Plugin BackWPup is prone to a cross-site scripting vulnerability because it fails to properly sanitize user-supplied input. An attacker may leverage this issue to execute arbitrary script code in the browser of an unsuspecting user in the context of the affected site. This can allow the attacker to steal cookie-based authentication credentials and launch other attacks. WordPress Plugin BackWPup version 3.2.3 is vulnerable; prior versions may also be affected.
Remediation
Edit the source code to ensure that input is properly sanitised or disable the plugin until a fix is available
References
http://www.vapidlabs.com/wp/wp_advisory.php?v=1158
http://blog.portswigger.net/2007/03/exploiting-xss-in-post-requests.html
Related Vulnerabilities
TYPO3 Unrestricted Upload of File with Dangerous Type Vulnerability (CVE-2010-3663)
Roundcube Cross-site Request Forgery (CSRF) Vulnerability (CVE-2016-4069)
WordPress Plugin FreshMail For WordPress Multiple SQL Injection Vulnerabilities (1.5.8)
WordPress Plugin WP Easy Columns Cross-Site Scripting (2.1.3)