CVE-2026-54239 FaustWP — Authentication Bypass via Initialization Vector Modification in Token Envelope

Faust.js is a headless WordPress toolkit. Prior to 1.8.11, the FaustWP WordPress plugin authenticates only the ciphertext in its token envelope and excludes the 16-byte initialization vector from the HMAC in WPE\FaustWP\Auth\encrypt and WPE\FaustWP\Auth\decrypt in...

CVE-2026-54239

FaustWP (a WordPress plugin within the Faust.js headless WordPress toolkit) contains an authentication bypass prior to version 1.8.11 . The root cause is in WPE\FaustWP\Auth\encrypt() and decrypt() (in plugins/faustwp/includes/auth/functions.php): the 16-byte initialization vector is excluded fro...