SAML Single Sign On – SSO Login, CVE-2026-19842

CVE, Research URL: CVE-2026-19842
Home page URL: Security reports for SAML Single Sign On – SSO Login
Application: SAML Single Sign On – SSO Login
Published on: Aug 19, 2026
Research Description: The SAML Single Sign On WordPress plugin before 5.4.7 does not verify the signature of a SAML response before storing the certificate it carries, and offers an administrator a one-click control that promotes that stored certificate to the site's trusted signing certificate, allowing unauthenticated attackers to have a certificate of their own trusted and then authenticate as any user, including an administrator.
Affected versions: max 5.4.7.
Status: vulnerable