CVE-2026-12939 Newsletters <= 4.15 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'link' Shortcode Attribute

The Newsletters Lite plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'link' attribute of the postthumbnail and newsletterspostthumbnail shortcodes in versions up to and including 4.15. This is due to insufficient input sanitization and output escaping in the postthumbnai...

CVE-2026-12939: Improper Neutralization of Input During Web Page Generation

The Newsletters Lite plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'link' attribute of the postthumbnail and newsletterspostthumbnail shortcodes in versions up to and including 4.15. This is due to insufficient input sanitization and output escaping in the postthumbnai...