wpengine faustjs vulnerabilities

Latest wpengine faustjs CVEs

Newest publication first

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

   Published 2026-09-17

   High·CVSS 8.8

   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 plugins/fau...

Sources: CVE.org, NVD, CISA KEV, FIRST EPSS, OSV and public exploit-reference metadata. Product matching comes from the published CVE records. A proof-of-concept means public code exists; it is not evidence of exploitation.