CVE-2026-18548

validatedZero produced an exploit or a check.

GHSA-x57v-8jrr-596c ↗EUVD-2026-101843 ↗

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.
trainingbusinesspros Groundhogg — CRM, Newsletters, and Marketing Automation <= 4.5.14
CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
ETK-2026-2393Zero's internal tracking ID, independent of the CVE number., permanent identifier
+7.0dTTV
<1mAI analysisAnalysis: how long the AI spent reversing this signal.
Check if you are vulnerable
timeline
0 = cve.org publication
trigger signal (cve.org) +0dcheck available+7.0dagent stopped
0
+2d
+4d
+6d

description

Groundhogg for WordPress versions through 4.5.14 are affected by stored cross-site scripting. An unauthenticated attacker may cause browser-executed script content to be stored in affected pages when those pages are later viewed.

mitigation

Update Groundhogg to a vendor release later than 4.5.14 after confirming that it addresses this issue. Until then, restrict public access to affected pages and review them for untrusted stored content.

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.
2026-10-15 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

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. 2026-10-15 05:30Z
    cve_org: trigger signal, started the run
  2. 2026-10-22 05:56Z

this entry in the feed

GET /api/v1/feed/CVE-2026-18548

{
  "etk_id": "ETK-2026-2393",
  "cve_id": "CVE-2026-18548",
  "display_id": "CVE-2026-18548",
  "ghsa_id": "GHSA-x57v-8jrr-596c",
  "euvd_id": "EUVD-2026-101843",
  "status": "published",
  "anchor_state": "anchored",
  "title": "Stored cross-site scripting in Groundhogg for WordPress",
  "summary": "Groundhogg for WordPress versions through 4.5.14 are affected by stored cross-site scripting. An unauthenticated attacker may cause browser-executed script content to be stored in affected pages when those pages are later viewed.",
  "mitigation": "Update Groundhogg to a vendor release later than 4.5.14 after confirming that it addresses this issue. Until then, restrict public access to affected pages and review them for untrusted stored content.",
  "vendor": "trainingbusinesspros",
  "product": "Groundhogg — CRM, Newsletters, and Marketing Automation",
  "affected": [
    {
      "affected_notes": [],
      "affected_ranges": [
        ">= 0, <= 4.5.14"
      ],
      "ecosystem": null,
      "fixed_versions": [],
      "package_name": "Groundhogg — CRM, Newsletters, and Marketing Automation",
      "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": null,
  "epss_percentile": null,
  "epss_asof": null,
  "automation": "deterministic",
  "check": true,
  "check_confidence_basis": "upstream",
  "exploit": false,
  "pipeline_minutes": 0.010084433333333333,
  "t0_at": "2026-10-15T05:30:22.068000+00:00",
  "signals": {
    "check": {
      "at": "2026-10-22T05:56:12.162689+00:00",
      "days": 7.017940910752315,
      "is_lower_bound": false,
      "measured_at": "2026-10-15T05:30:22.068000+00:00",
      "url": null
    },
    "trigger_signal": {
      "at": "2026-10-15T05:30:22.068000+00:00",
      "days": 0,
      "is_lower_bound": false,
      "measured_at": "2026-10-15T05:30:22.068000+00:00",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-18548"
    }
  }
}

published 2026-10-22 05:56Z
last change 2026-10-22 07:40Z

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