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CVE-2021-34658

MEDIUM CVSS: 6.1 Published: 2021-08-16 Modified: 2026-06-17

Description

The Simple Popup Newsletter WordPress plugin is vulnerable to Reflected Cross-Site Scripting due to the use of $_SERVER['PHP_SELF'] in the ~/simple-popup-newsletter.php file which allows attackers to inject arbitrary web scripts, in versions up to and including 1.4.7.

Affected Platforms

Keszites Simple Popup Newsletter

Weakness Type

CWE-79, CWE-79

References