CVE-2026-15981

01/תיאור (מקור, אנגלית)

The SAML Single Sign On – SSO Login plugin for WordPress is vulnerable to Authentication Bypass in all versions up to, and including, 5.4.4. This is due to the mo_saml_validate_signature() function performing a loose boolean check on the raw tri-state integer returned by PHP's openssl_verify(), causing an error return value of -1 to be evaluated as truthy and therefore treated as a successful signature verification. This makes it possible for unauthenticated attackers to log in as any existing WordPress user, including administrators, by submitting a crafted SAMLResponse containing an attacker-controlled NameID and a deliberately malformed signature value that triggers an OpenSSL processing error — bypassing verification entirely and resulting in wp_set_auth_cookie() being called for the targeted account.

02/קישורים7

• 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/3611421/miniorange-saml-2‮…
• www.wordfence.com/threat-intel/vulnerabilities/id/b412f60f-61e‮…