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 Joomla! Core 3.x.x SQL Injection (3.0.0 - 3.4.6) Dolibarr Incorrect Authorization Vulnerability (CVE-2021-37517) WordPress Plugin Apptivo Business Site CRM Multiple Cross-Site Scripting Vulnerabilities (1.2.9) WordPress Plugin Tidio Live Chat Cross-Site Request Forgery (4.1.0) WordPress Plugin TubePress Cross-Site Scripting (1.6.0) Severity Critical Classification CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Tags Missing Update Known Vulnerabilities CVE-2011-3621