6.5
MediumCVSS 3.1 · from Wordfence
CVE-2026-100155
Ninja Forms <= 3.15.5 - Unauthenticated Arbitrary Shortcode Execution via 'formData' Field Value via Success Message Merge Tag
Ninja Forms – Contact Form Builder with Calculators, Quizzes, Signatures & AI Form Builder · Code injection · CWE-94AffectedNinja Forms – Contact Form Builder with Calculators, Quizzes, Signatures & AI Form Builder
FixNo fix listed yet.
PublishedOct 31, 05:33 · Wordfence
ScoredOct 31 · 6.5 · Wordfence
Exploit code publicNone known · checked 21:18 UTC
ExploitedNone known · CISA KEV checked 22:07 UTC
What we know
No known exploitation. CISA KEV, checked 22:07 UTC.
No public exploit code known. Exploit-DB, Metasploit, Nuclei, checked 21:18 UTC.
An attacker only needs network access to the target. No login needed. CVSS: network, no privileges.
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.
From Wordfence
Affected and fixed versions
ProductAffectedFixed inNinja Forms – Contact Form Builder with Calculators, Quizzes, Signatures & AI Form Builderup to 3.15.5–
Exploit code
Exploit-DBnone knownMetasploitnone knownNucleinone known