CVE-2026-15013

EIP tracks 1 public exploit for CVE-2026-15013. PoCs published by zer0dayf.

AI-analyzed exploit summary This PoC exploits CVE-2026-15013, an authentication bypass vulnerability in miniOrange SAML SSO WordPress plugin (<=5.4.3) via HMAC signature algorithm confusion. The exploit forges SAML assertions using the IdP's RSA public key as an HMAC shared secret, enabling unauthenticated admin access and arbitrary command execution via webshell or reverse shell.

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.