Nginx is free and open-source server, which can be used as Web server, reverse proxy server, load balancer and HTTP cache. Nginx 0.8.41 through 1.4.3 and 1.5.x before 1.5.7 allows remote attackers to bypass intended restrictions via an unescaped space character in a URI. This rule supports to defend the A6: Vulnerable and Outdated Components and A5: Security Misconfiguration of OWASP Top 10 - 2021. Other reference:None