CyberRota Analysis
AI-GeneratedThe SAML Single Sign On – SSO Login plugin for WordPress is vulnerable to an authentication bypass due to improper handling of the `SignatureMethod` Algorithm attribute, allowing attackers to forge SAML assertions. This critical vulnerability enables unauthenticated users to gain administrator-level access to any WordPress account by obtaining valid authentication cookies. All WordPress site administrators using affected versions should prioritize immediate updates to mitigate the risk of account takeover.
Original NVD Description
The SAML Single Sign On – SSO Login plugin for WordPress is vulnerable to Authentication Bypass via SAML Signature Algorithm Confusion in all versions up to, and including, 5.4.3. The vulnerability exists because `Mo_SAML_Utilities::mo_saml_cast_key()` reads the `SignatureMethod` Algorithm attribute directly from the attacker-controlled `SAMLResponse` parameter rather than enforcing the locally configured algorithm, causing the plugin to recast the IdP's RSA public key as an HMAC-SHA1 shared secret and validate the forged signature against it. This makes it possible for unauthenticated attackers to forge a SAML assertion targeting any WordPress account — including administrators — obtain valid WordPress authentication cookies, and achieve full administrator-level account takeover.