'OfferBox' App for Android versions 2.0.0 to 2.3.17 and 'OfferBox' App for iOS versions 2.1.7 to 2.6.14 use a hard-coded secret key for JWT. Secret key for JWT may be retrieved if the application binary is reverse-engineered.Referenceshttps://jvn.jp/en/jp/JVN83405304/