CyberSecurity News
WordPress Websites Targeted via MiniOrange Plugin Vulnerabilities
AI summary
Vulnerabilities in the MiniOrange SAML 2.0 SSO plugin are being exploited to target WordPress websites. The vulnerabilities, identified as CVE-2026-61979 and CVE-2026-15981, are authentication bypass flaws. These issues affect the MiniOrange plugin, which is used for single sign-on functionality. The vulnerabilities pose a risk to WordPress websites that use this plugin.
Vulnerabilities mentioned
Unauthenticated Privilege Escalation in SAML SP Single Sign On <= 5.4.3 versions.
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.
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