CyberRota Analysis
AI-GeneratedThe Newsletter plugin for WordPress is vulnerable to Stored Cross-Site Scripting (XSS) due to inadequate input sanitization and output escaping in the 'np1' Custom Field Parameter across all versions up to 9.4.0. This vulnerability allows unauthenticated attackers to inject malicious scripts that execute when users access affected pages, potentially compromising user data and site integrity. WordPress site administrators using this plugin should prioritize immediate updates to mitigate the risk of exploitation.
Original NVD Description
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.