CVE-2021-38320: Simplesamlphp Authentication Project Simplesamlphp Authentication

Medium severity, CVSS 6.1. EPSS: 1% chance of exploitation in the next 30 days.

The simpleSAMLphp Authentication WordPress plugin is vulnerable to Reflected Cross-Site Scripting due to a reflected $_SERVER["PHP_SELF"] value in the ~/simplesamlphp-authentication.php file which allows attackers to inject arbitrary web scripts, in versions up to and including 0.7.0.

Affected products

• Simplesamlphp Authentication Project Simplesamlphp Authentication: up to and including 0.7.0

Published 2021-09-09. Last modified 2026-06-17.