WordPress SAML Single Sign On plugin 4.8.85-5.4.6 - Unauthenticated Administrator Account Takeover via SAML Trust Anchor Overwrite vulnerability

Unauthenticated Administrator Account Takeover via SAML Trust Anchor Overwrite vulnerability discovered by Suhayb Ahmed in WordPress Plugin SAML Single Sign On – SSO Login versions 4.8.85-5.4.6...

CVE-2026-19842 SAML Single Sign On 4.8.85 - 5.4.6 - Unauthenticated Administrator Account Takeover via SAML Trust Anchor Overwrite

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 unauthenticat...