{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-75807","assignerOrgId":"b15e7b5b-3da4-40ae-a43c-f7aa60e62599","state":"PUBLISHED","assignerShortName":"Wordfence","dateReserved":"2026-08-18T09:38:56.449Z","datePublished":"2026-08-29T17:25:48.408Z","dateUpdated":"2026-08-29T17:25:48.408Z"},"containers":{"cna":{"providerMetadata":{"orgId":"b15e7b5b-3da4-40ae-a43c-f7aa60e62599","shortName":"Wordfence","dateUpdated":"2026-08-29T17:25:48.408Z"},"affected":[{"vendor":"cyberlord92","product":"SAML Single Sign On – SSO Login","versions":[{"version":"0","status":"affected","lessThanOrEqual":"5.4.6","versionType":"semver"}],"defaultStatus":"unaffected"}],"descriptions":[{"lang":"en","value":"The SAML Single Sign On – SSO Login plugin for WordPress is vulnerable to Authentication Bypass in versions up to, and including, 5.4.6. This is due to the mo_saml_login_validate() ACS handler persisting the X.509 certificate extracted from an incoming SAMLResponse into the mo_saml_required_certificate option before the signature-validation verdict is enforced, because mo_saml_find_certificate() returns false on a fingerprint mismatch rather than halting execution. This makes it possible for unauthenticated attackers to overwrite the plugin's stored IdP signing certificate with an attacker-controlled value, and subsequently forge SAML assertions for any WordPress account — including administrators — to obtain a fully privileged session. Note: The exploit requires the administrator to perform a repair after receiving the test_config_error_wpsamlerr004 error message during the test configuration."}],"title":"SAML Single Sign On <= 5.4.6 - Unauthenticated Authentication Bypass via X.509 Certificate Poisoning","references":[{"url":"https://www.wordfence.com/threat-intel/vulnerabilities/id/9baea072-2c07-40b6-8410-2ebe752b0874?source=cve"},{"url":"https://plugins.trac.wordpress.org/browser/miniorange-saml-20-single-sign-on/tags/5.4.6/class-mo-saml-login-validate.php#L236"},{"url":"https://plugins.trac.wordpress.org/browser/miniorange-saml-20-single-sign-on/tags/5.4.6/class-mo-saml-login-validate.php#L292"},{"url":"https://plugins.trac.wordpress.org/browser/miniorange-saml-20-single-sign-on/tags/5.4.6/class-mo-saml-utilities.php#L739"},{"url":"https://plugins.trac.wordpress.org/browser/miniorange-saml-20-single-sign-on/tags/5.4.6/mo-saml-settings-page.php#L141"}],"problemTypes":[{"descriptions":[{"lang":"en","description":"CWE-287 Improper Authentication","cweId":"CWE-287","type":"CWE"}]}],"metrics":[{"cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H","baseScore":7.5,"baseSeverity":"HIGH"}}],"credits":[{"lang":"en","type":"finder","value":"Tanishq Shah"},{"lang":"en","type":"finder","value":"Thatchapol Booranatanit (AliceZz)"}],"timeline":[{"time":"2026-08-18T09:55:16.000Z","lang":"en","value":"Vendor Notified"},{"time":"2026-08-29T05:01:46.000Z","lang":"en","value":"Disclosed"}]}}}