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CVE-2026-100151VulnerabilityPublished

The Ninja Forms – Contact Form Builder with Calculators, Quizzes, Signatures & AI Form Builder plugin for WordPress is

Source GCVE Database

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Authoritative record:CVE-2026-100151· Medium 6.1

Not known to be exploited · CVSS 6.1 Medium.

Data as of 31 Oct 2026, 13:38 UTC

CVSS 3.1 base score
6.1Medium
How severe the flaw is on the 0–10 CVSS scale.

Thin evidence

One scorer or none
CVSS scores by source
CNA (Wordfence)CVSS 3.16.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/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 avoid clicking suspicious links that include crafted query parameters targeting this vulnerability. Monitor official Ninja Forms plugin updates for patches addressing this issue.

Description

The Ninja Forms plugin for WordPress up to version 3.15.5 is vulnerable to reflected DOM-based cross-site scripting (XSS) via a crafted 'querystring:<key>' URL parameter. This vulnerability arises from insufficient input sanitization and output escaping, allowing unauthenticated attackers to inject arbitrary scripts that execute in the context of a victim's browser if they are tricked into clicking a malicious link.

References

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