Description
The sanitize_css method 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 \n (newline) characters, which makes it easier for remote attackers to conduct cross-site scripting (XSS) attacks via crafted Cascading Style Sheets (CSS) token sequences.
Remediation
References
Related Vulnerabilities
PostgreSQL Missing Authorization Vulnerability (CVE-2020-1720)
Liferay DXP Authorization Bypass Through User-Controlled Key Vulnerability (CVE-2025-43810)
MySQL CVE-2022-21641 Vulnerability (CVE-2022-21641)
TCExam Exposure of Sensitive Information to an Unauthorized Actor Vulnerability (CVE-2011-3806)