Description
The sanitize helper in lib/action_controller/vendor/html-scanner/html/sanitizer.rb in the Action Pack component in Ruby on Rails before 2.3.18, 3.0.x and 3.1.x before 3.1.12, and 3.2.x before 3.2.13 does not properly handle encoded : (colon) characters in URLs, which makes it easier for remote attackers to conduct cross-site scripting (XSS) attacks via a crafted scheme name, as demonstrated by including a : sequence.
Remediation
References
Related Vulnerabilities
WordPress Plugin Backup Migration Cross-Site Request Forgery (1.2.9)
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WordPress Plugin WP Activity Log PHP Object Injection (3.2.5)
phpMyAdmin 7PK - Security Features Vulnerability (CVE-2016-9865)