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4.4

WordPress Membership Plugin Vulnerable to Malicious Scripts in Invoices

CVE-2026-1304
Summary

The Membership Plugin for WordPress is at risk of being compromised by malicious scripts in the invoice settings. If an attacker gains admin access, they can inject scripts that will run when users view certain pages. To protect your site, update the plugin to a version newer than 3.2.18 or consider replacing it with a different plugin.

Original title
The Membership Plugin – Restrict Content for WordPress is vulnerable to Stored Cross-Site Scripting via multiple invoice settings fields in all versions up to, and including, 3.2.18 due to insuffic...
Original description
The Membership Plugin – Restrict Content for WordPress is vulnerable to Stored Cross-Site Scripting via multiple invoice settings fields in all versions up to, and including, 3.2.18 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with administrator-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.
nvd CVSS3.1 4.4
Vulnerability type
CWE-79 Cross-site Scripting (XSS)
Published: 18 Feb 2026 · Updated: 11 Mar 2026 · First seen: 6 Mar 2026