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
Jenkins Improper Input Validation Vulnerability (CVE-2012-6073)
WordPress Plugin Copy or Move Comments Multiple Vulnerabilities (1.0.0)
SharePoint CVE-2020-1583 Vulnerability (CVE-2020-1583)
PHP Numeric Errors Vulnerability (CVE-2013-7226)
WordPress Plugin WP Super Cache Cross-Site Scripting (1.7.2)