Description A reverse proxy issue exists in FluxBB before 1.4.7 when FORUM_BEHIND_REVERSE_PROXY is enabled. Remediation References CVE-2011-3621 Related Vulnerabilities WordPress Plugin AdSense Manager Cross-Site Scripting (4.0.3) Envoy Proxy NULL Pointer Dereference Vulnerability (CVE-2019-18838) phpMyFAQ Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') Vulnerability (CVE-2022-4407) ownCloud Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') Vulnerability (CVE-2015-5953) Drupal Core 4.6.x Cross-Site Request Forgery (4.6.0 - 4.6.9) Severity Critical Classification CVE-2011-3621 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Tags Missing Update Known Vulnerabilities