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Vulnerabilities

Vulnerability · CVE-2026-94504

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Published Oct 6, 2026 · catalog updated Oct 6, 2026 · Ninja Forms – Contact Form Builder with Calculators, Quizzes, Signatures & AI Form Builder

Patch now

CVE-2026-94504 is in the CISA known-exploited catalog. Confirm Ninja Forms – Contact Form Builder with Calculators, Quizzes, Signatures & AI Form Builder against the vendor advisory and apply that fix. The CVSS score does not change the priority.

Gaps on this record

  • No version range is stored. A customer cannot check an installed version against this record.
Severity
Unknown—
Known exploitation
CISA KEV and VulnCheck KEV
EPSS
0.41%
Remediation
Remediation guidance
Affected products
vendor kstover Ninja Forms – Contact Form Builder with Calculators, Quizzes, Signatures & AI Form Builder

Ninja Forms 3.15.3 stores an anonymous non-RTE textarea value and renders it without safe HTML encoding in the legacy submission editor. An attacker can break out of the textarea with stored script. When an Administrator opens the attacker-known direct submission URL, the script runs in the WordPress admin origin.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • vendor kstover Ninja Forms – Contact Form Builder with Calculators, Quizzes, Signatures & AI Form Builderversion unspecified

How to fix CVE-2026-94504

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

CVE-2026-94504 is in the CISA known-exploited catalog. Confirm Ninja Forms – Contact Form Builder with Calculators, Quizzes, Signatures & AI Form Builder against the vendor advisory and apply that fix. The CVSS score does not change the priority.

Which versions are affected?

Affected version ranges are not on this record. Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable.

What should an analyst verify?

No weakness class is stored. EPSS 0.41%. The CISA KEV listing is the exploitation evidence. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Technology hubs

WordPress security

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Oct 6, 2026 · CISA KEV

    Known exploited

    Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable.

  2. Oct 6, 2026 · Patchstack Database

    Detected

    CVE-2026-94504 is listed by Four ways back in: the WordPress XSS campaign that hides its own admin account.

Sources

  • CVE.orgVulnerability recordCVE-2026-94504

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-94504

    30-day exploitation probability 0.4%

    first.org
  • Patchstack DatabaseVendor advisoryCVE-2026-94504

    Two unrelated WordPress plugins, two separate stored Cross-Site Scripting vulnerabilities, one payload. Over the past several days our telemetry has recorded exploitation attempts against both, and every attempt pulls the same JavaScript from imgcdn1.com. Two is what we have conf

    patchstack.com
  • VulnCheck KEVConfirmed exploitationCVE-2026-94504

    Ninja Forms 3.15.3 stores an anonymous non-RTE textarea value and renders it without safe HTML encoding in the legacy submission editor. An attacker can break out of the textarea with stored script. When an Administrator opens the attacker-known direct submission URL, the script

    vulncheck.com

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.