CVE-2026-90438

validatedZero produced an exploit or a check.

GHSA-7cq6-x444-93vj ↗EUVD-2026-91177 ↗

check availableZero validated a working check for it.not proven exploitableZero has a detection check, but hasn't produced a full working exploit yet.
cve.orgpublic pocExploit code has been published by someone. Source signals can also carry a PoC (Proof of Concept).kevAttacks confirmed in the real world.
kstover Ninja Forms – Contact Form Builder with Calculators, Quizzes, Signatures & AI Form Builder <= 3.15.4
CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
ETK-2026-426, permanent identifier
+1.1dTTV
1h 04mAI analysisAnalysis: how long the AI spent reversing this signal.
Check if you are vulnerable
timeline
0 = trigger signal
trigger signal (cve.org) +0hcheck available+26h28magent stopped
0
+6h
+12h
+18h
+24h

description

Ninja Forms for WordPress through version 3.15.4 is affected by stored cross-site scripting in Paragraph Text fields. An unauthenticated attacker may cause script content to be stored and later run in a visitor's browser if the targeted field has the Rich Text Editor option enabled.

mitigation

Disable the Rich Text Editor option on Paragraph Text fields, especially on forms that accept public submissions. Restrict or disable public form submissions where that configuration cannot be changed.

check
available
exploit
no
automationDeterministic: a check that runs on its own, the same request on every target. Contextual: an agentic technique that needs to be applied per target, for bugs that depend on contextual flows.
deterministic
auth requiredWhether an attacker needs an account first, based on the CVSS vector's Privileges Required.
no
EPSSEstimate of the chance this CVE is exploited in the next 30 days. Refreshed daily.
0.29%20th percentile
agent run time
1h 04m
cve.org record, t = 0The moment cve.org publishes the CVE in full.
2026-10-02 05:30Z
Δ to public pocExploit code has been published by someone. Source signals can also carry a PoC (Proof of Concept).
–
Δ to kevAttacks confirmed in the real world.
–

outcome

Check only, differential: the check fires on the vulnerable build and is silent on the patched one.

source signals

Public signals that triggered or updated the pipeline. These are inputs for the deltas above.

  1. 2026-10-02 05:30Z
    cve_org: trigger signal, started the run

this entry in the feed

GET /api/v1/feed/CVE-2026-90438

{
  "etk_id": "ETK-2026-426",
  "cve_id": "CVE-2026-90438",
  "display_id": "CVE-2026-90438",
  "ghsa_id": "GHSA-7cq6-x444-93vj",
  "euvd_id": "EUVD-2026-91177",
  "status": "published",
  "anchor_state": "anchored",
  "title": "Stored cross-site scripting in Ninja Forms",
  "summary": "Ninja Forms for WordPress through version 3.15.4 is affected by stored cross-site scripting in Paragraph Text fields. An unauthenticated attacker may cause script content to be stored and later run in a visitor's browser if the targeted field has the Rich Text Editor option enabled.",
  "mitigation": "Disable the Rich Text Editor option on Paragraph Text fields, especially on forms that accept public submissions. Restrict or disable public form submissions where that configuration cannot be changed.",
  "vendor": "kstover",
  "product": "Ninja Forms – Contact Form Builder with Calculators, Quizzes, Signatures & AI Form Builder",
  "affected": [
    {
      "affected_notes": [],
      "affected_ranges": [
        ">= 0, <= 3.15.4"
      ],
      "ecosystem": null,
      "fixed_versions": [],
      "package_name": "Ninja Forms – Contact Form Builder with Calculators, Quizzes, Signatures & AI Form Builder",
      "purl": null
    }
  ],
  "cwes": [
    79
  ],
  "cvss_score": 7.2,
  "cvss_src": "cna_vendor",
  "cvss_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N",
  "epss_score": 0.0029,
  "epss_percentile": 0.2051,
  "epss_asof": "2026-10-20",
  "automation": "deterministic",
  "check": true,
  "check_confidence_basis": "differential",
  "exploit": false,
  "pipeline_minutes": 64.11015683333333,
  "t0_at": "2026-10-02T05:30:17.547000+00:00",
  "signals": {
    "check": {
      "at": "2026-10-03T07:58:27.414000+00:00",
      "days": 1.1028919791666667,
      "is_lower_bound": false,
      "measured_at": "2026-10-02T05:30:17.547000+00:00",
      "url": null
    },
    "trigger_signal": {
      "at": "2026-10-02T05:30:17.547000+00:00",
      "days": 0,
      "is_lower_bound": false,
      "measured_at": "2026-10-02T05:30:17.547000+00:00",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-90438"
    }
  }
}

published 2026-10-03 06:54Z
last change 2026-10-21 12:26Z

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