CVE-2026-110899

validatedZero produced an exploit or a check.

GHSA-ww28-j4j5-3mp6 ↗EUVD-2026-107137 ↗

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.
Kevin Stover Ninja Forms <= 3.15.5
ETK-2026-2306Zero's internal tracking ID, independent of the CVE number., permanent identifier
+1h53mTTV
<1mAI analysisAnalysis: how long the AI spent reversing this signal.
Check if you are vulnerable
timeline
0 = cve.org publication
trigger signal (cve.org) +0hcheck available+1h53magent stopped
0
+1h
+2h

description

Ninja Forms versions through 3.15.5 are affected by a stored cross-site scripting flaw. An unauthenticated attacker may cause attacker-controlled script to be stored and later run when another user views the affected content; user interaction is required.

mitigation

Update Ninja Forms to a vendor-supported release that confirms remediation; the evidence does not name a fixed version. Until then, disable or restrict public use of Ninja Forms where practical and review stored form content for untrusted entries.

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.
–
agent run time
<1m
cve.org record, t = 0The moment cve.org publishes the CVE in full.
2026-10-21 08:00Z
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

Upstream: a detection for this already ships elsewhere, so we didn't generate a new one. The credit goes to whoever did.

source signals

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

  1. 2026-10-21 08:00Z
    ghsa: trigger signal, started the run
  2. 2026-10-21 08:00Z
  3. 2026-10-21 09:53Z

this entry in the feed

GET /api/v1/feed/CVE-2026-110899

{
  "etk_id": "ETK-2026-2306",
  "cve_id": "CVE-2026-110899",
  "display_id": "CVE-2026-110899",
  "ghsa_id": "GHSA-ww28-j4j5-3mp6",
  "euvd_id": "EUVD-2026-107137",
  "status": "published",
  "anchor_state": "anchored",
  "title": "Stored cross-site scripting in Ninja Forms",
  "summary": "Ninja Forms versions through 3.15.5 are affected by a stored cross-site scripting flaw. An unauthenticated attacker may cause attacker-controlled script to be stored and later run when another user views the affected content; user interaction is required.",
  "mitigation": "Update Ninja Forms to a vendor-supported release that confirms remediation; the evidence does not name a fixed version. Until then, disable or restrict public use of Ninja Forms where practical and review stored form content for untrusted entries.",
  "vendor": "Kevin Stover",
  "product": "Ninja Forms",
  "affected": [
    {
      "affected_notes": [],
      "affected_ranges": [
        ">= 0, <= 3.15.5"
      ],
      "ecosystem": null,
      "fixed_versions": [],
      "package_name": "ninja-forms",
      "purl": null
    }
  ],
  "cwes": null,
  "cvss_score": 7.1,
  "cvss_src": "cna_vendor",
  "cvss_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L",
  "epss_score": null,
  "epss_percentile": null,
  "epss_asof": null,
  "automation": "deterministic",
  "check": true,
  "check_confidence_basis": "upstream",
  "exploit": false,
  "pipeline_minutes": 0.011110383333333333,
  "t0_at": "2026-10-21T08:00:20.542000+00:00",
  "signals": {
    "check": {
      "at": "2026-10-21T09:53:44.977984+00:00",
      "days": 0.07875504611111112,
      "is_lower_bound": false,
      "measured_at": "2026-10-21T08:00:20.542000+00:00",
      "url": null
    },
    "trigger_signal": {
      "at": "2026-10-21T08:00:20.542000+00:00",
      "days": 0,
      "is_lower_bound": false,
      "measured_at": "2026-10-21T08:00:20.542000+00:00",
      "url": "https://github.com/advisories/GHSA-ww28-j4j5-3mp6"
    }
  }
}

published 2026-10-21 09:53Z
last change 2026-10-21 12:26Z

Need the technical details behind an entry?

Every entry here shows what we attempted and when. The technical details, the generated exploit that fired it and the evidence behind the verdict are not public. Tell us about your use case and we’ll get back to you about extended API access.