CVE-2026-13447

The MStore API WordPress plugin (versions ≤ 4.20.0) is vulnerable to an unauthenticated authentication bypass via JWT forgery. The root cause lies in FirebasePhoneAuthHelper::verify_id_token(), which validates Firebase ID token claims (alg, kid, aud, iss) but never verifies the JWT cryptographic ...

CVE-2026-13447 MStore API <= 4.20.0 - Unauthenticated Authentication Bypass via 'id_token' Parameter JWT Forgery

The Mstore Api plugin for WordPress is vulnerable to Authentication Bypass via JWT Forgery in versions up to, and including, 4.20.0 This is due to missing cryptographic signature verification in the FirebasePhoneAuthHelper::verifyidtoken function, which decodes and validates Firebase ID token...