CVE-2025-55740: Anipaleja Nginx-Defender

Medium severity, CVSS 6.5. EPSS: 0.2% chance of exploitation in the next 30 days.

nginx-defender is a high-performance, enterprise-grade Web Application Firewall (WAF) and threat detection system engineered for modern web infrastructure. This is a configuration vulnerability affecting nginx-defender deployments. Example configuration files config.yaml and docker-compose.yml contain default credentials (default_password: "change_me_please", GF_SECURITY_ADMIN_PASSWORD=admin123). If users deploy nginx-defender without changing these defaults, attackers with network access could gain administrative control, bypassing security protections. The issue is addressed in v1.5.0 and later.

Affected products

• Anipaleja Nginx-Defender: before 1.5.0 (fixed in 1.5.0)

Published 2025-08-19. Last modified 2026-06-17.