CVE-2026-15013

01/תיאור (מקור, אנגלית)

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.

02/קישורים8

• plugins.trac.wordpress.org/browser/miniorange-saml-20-single-s‮…
• plugins.trac.wordpress.org/browser/miniorange-saml-20-single-s‮…
• plugins.trac.wordpress.org/browser/miniorange-saml-20-single-s‮…
• plugins.trac.wordpress.org/browser/miniorange-saml-20-single-s‮…
• plugins.trac.wordpress.org/browser/miniorange-saml-20-single-s‮…
• plugins.trac.wordpress.org/changeset?reponame=&old=3601345%40m‮…
• www.wordfence.com/threat-intel/vulnerabilities/id/ee95092d-635‮…
• seclists.org/fulldisclosure/2026/Aug/33