CVE Catalog

CVE-2026-96566

HighCVSS 7.2
Published: Updated: Translated: NVD NIST

Exploitation Probability (EPSS)

Low risk
0.27%

18th percentile - higher than 18% of all known CVEs

Summary

The Newsletter – Send awesome emails from WordPress plugin for WordPress is vulnerable to Stored Cross-Site Scripting via 'np1' Custom Field Parameter in all versions up to and including 9.4.0 due to insufficient input sanitization and output escaping. The subscription endpoint requires no nonce, no capability check, and no CAPTCHA, and the payload can be smuggled past email-address validation by embedding the {profile_1} placeholder in the local part of the submitted address.

Risk Assessment

An unauthenticated attacker can inject malicious scripts that execute in the browser of users visiting affected pages, potentially leading to data theft or session hijacking.

Recommendation

Update the Newsletter plugin to the latest patched version and consider adding additional protections such as CAPTCHA to the subscription endpoint.

Related vulnerabilities

Original NVD description (English source)

The Newsletter – Send awesome emails from WordPress plugin for WordPress is vulnerable to Stored Cross-Site Scripting via 'np1' Custom Field Parameter in all versions up to, and including, 9.4.0 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. The subscription endpoint (na=sa) requires no nonce, no capability check, and no CAPTCHA, and the payload can be smuggled past email-address validation by embedding the {profile_1} placeholder in the local part of the submitted address, since WordPress's is_email() permits curly braces there.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS