What’s Vulnerable › Vulnerabilities

CVE-2021-38320: simpleSAMLphp Authentication <= 0.7.0 Reflected Cross-Site Scripting

• Severity: medium (CVSS 6.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.0% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2021-09-09 · updated 2026-06-17
• Weakness: CWE-79

Description

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: through 0.7.0

References

• https://plugins.trac.wordpress.org/browser/simplesamlphp-authentication/tags/0.7.0/simplesamlphp-authentication.php#L307
• https://www.wordfence.com/vulnerability-advisories/#CVE-2021-38320
• https://plugins.trac.wordpress.org/browser/simplesamlphp-authentication/tags/0.7.0/simplesamlphp-authentication.php#L307
• https://www.wordfence.com/vulnerability-advisories/#CVE-2021-38320

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