Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Kunal Nagar Custom 404 Pro allows Reflected XSS.This issue affects Custom 404 Pro: from n/a through 3.11.1.CreditsDimas Maulana (Patchstack Alliance)Referenceshttps://patchstack.com/database/vulnerability/custom-404-pro/wordpress-custom-404-pro-plugin-3-11-1-reflected-cross-site-scripting-xss-vulnerability?_s_id=cve