### Duplicate Advisory This advisory has been withdrawn because it is a duplicate of GHSA-38p6-h87p-r4cg. This link is maintained to preserve external references. ### Original Description Grav CMS before 2.0.16 contains a timing vulnerability in Utils::verifyNonce() that uses non-constant-time string comparison with the === operator instead of hash_equals() for CSRF nonce validation. Attackers can measure response timing differences to recover valid nonce values byte-by-byte through multiple requests, weakening CSRF protection below its intended security margin.