CVE-2026-52539
CriticalCVSS 9.1Exploitation Probability (EPSS)
Low risk12th percentile - higher than 12% of all known CVEs
Summary
Outstatic CMS <= 2.1.9 contains a hardcoded JWT signing secret. When the OST_TOKEN_SECRET environment variable is not set, the application falls back to a default value publicly visible in the source code repository.
Risk Assessment
An unauthenticated remote attacker can forge JWT session tokens with arbitrary user data and full administrative permissions, leading to complete system compromise.
Recommendation
Immediately update Outstatic CMS to version 2.2.0 or later and set a strong, unique secret in the OST_TOKEN_SECRET environment variable.
Original NVD description (English source)
Outstatic CMS <= 2.1.9 contains a hardcoded JWT signing secret. When the OST_TOKEN_SECRET environment variable is not set, the application falls back to the default value which is publicly visible in the source code repository. An unauthenticated remote attacker can exploit this by forging JWT session tokens with arbitrary user data and full administrative permissions.