Is CVE-2026-100155 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-100155?

CVE-2026-100155 has a CVSS v3 severity of MEDIUM (6.5).

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CVE-2026-100155

Description

The The Ninja Forms – Contact Form Builder with Calculators, Quizzes, Signatures & AI Form Builder plugin for WordPress is vulnerable to arbitrary shortcode execution in all versions up to, and including, 3.15.5 This is due to the software allowing users to execute an action that does not properly validate a value before running do_shortcode. This makes it possible for unauthenticated attackers to execute arbitrary shortcodes.