Vulnerability · Published Aug 19, 2026 · Assigned by WPScan

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

High 8.8

In plain English

A high-severity improper authentication in SAML Single Sign On from Unknown. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 22% of all known vulnerabilities).

Severity (CVSS 3.1)8.8High

Exploit odds (30 days)0.3%top 78.3% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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 (as reported)

Vendor	Product	Versions
Unknown	SAML Single Sign On	4.8.85 – before 5.4.7

Weakness: CWE-287 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

References

https://wpscan.com/vulnerability/7b79d86e-d3f8-4d4f-929b-fd00540cc00f/ exploit, vdb-entry, technical-description