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OpenAdvisories
High · 8.8 CVE-2026-19842 EUVD-2026-62293GHSA-qj54-25r3-fmh2

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

Published Aug 19, 2026 · Updated Aug 19, 2026 · Assigned by WPScan

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 products

VendorProductAffectedFixed
— SAML Single Sign On 4.8.85 – < 5.4.7 5.4.7

References