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VulnerabilityPublished

CVE-2026-100155: Ninja Forms (WordPress plugin) · Code Injection

Affects Ninja Forms (WordPress plugin)Source CVE Database V5

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Not known to be exploited · CVSS 6.5 Medium.

Data as of 31 Oct 2026, 06:06 UTC

CVSS 3.1 base score
6.5Medium
How severe the flaw is on the 0–10 CVSS scale.

Thin evidence

One scorer or none
CVSS scores by source
CNA (Wordfence)CVSS 3.16.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 31 Oct 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 30 Oct 2026.

What to do

Affected software

ProductAffectedFixed in
kstoverNinja Forms – Contact Form Builder with Calculators, Quizzes, Signatures & AI Form BuilderAffected
  • <=3.15.5
Fixed in–

AI-suggested

Until a fix is available, users should consider restricting access to vulnerable plugin functionality or disabling the plugin if possible.

Description

Ninja Forms – Contact Form Builder with Calculators, Quizzes, Signatures & AI Form Builder plugin for WordPress versions up to 3.15.5 is vulnerable to arbitrary shortcode execution. This vulnerability arises because the plugin does not properly validate input before executing shortcodes via do_shortcode, allowing unauthenticated attackers to execute arbitrary shortcodes.

References

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