CVE-2026-18027

validatedZero produced an exploit or a check.

GHSA-7r74-667v-4q77 ↗EUVD-2026-64606 ↗

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.+79d
WebToffee woocommerce_pdf_invoices\,_packing_slips\,_delivery_notes_and_shipping_labels <= 4.9.8
ETK-2026-3964Zero's internal tracking ID, independent of the CVE number., permanent identifier
+79dTTV
<1mAI analysisAnalysis: how long the AI spent reversing this signal.
Check if you are vulnerable
timeline
0 = trigger signal
cve.org publication−78dtrigger signal +0dcheck available+0.6dkev+1.0dagent stopped
−60d
−40d
−20d

description

WebToffee WooCommerce PDF Invoices, Packing Slips, Delivery Notes & Shipping Labels versions through 4.9.8 are affected by a path-traversal flaw. An authenticated user with subscriber-level access or greater may obtain server file contents through invoice output functions, subject to access to the required invoice request values.

mitigation

Disable or remove the affected plugin where possible, especially on sites that allow untrusted accounts. Until a vendor-fixed release is confirmed, restrict subscriber account creation and limit access to invoice print and download functionality.

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.
yes, low privileges
EPSSEstimate of the chance this CVE is exploited in the next 30 days. Refreshed daily.
0.87%58th percentile
agent run time
<1m
cve.org record, t = 0The moment cve.org publishes the CVE in full.
2026-08-22 23:27Z
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.
+79d

outcome

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

this entry in the feed

GET /api/v1/feed/CVE-2026-18027

{
  "etk_id": "ETK-2026-3964",
  "cve_id": "CVE-2026-18027",
  "display_id": "CVE-2026-18027",
  "ghsa_id": "GHSA-7r74-667v-4q77",
  "euvd_id": "EUVD-2026-64606",
  "status": "published",
  "anchor_state": "anchored",
  "title": "Path traversal in WebToffee WooCommerce invoice document plugin",
  "summary": "WebToffee WooCommerce PDF Invoices, Packing Slips, Delivery Notes & Shipping Labels versions through 4.9.8 are affected by a path-traversal flaw. An authenticated user with subscriber-level access or greater may obtain server file contents through invoice output functions, subject to access to the required invoice request values.",
  "mitigation": "Disable or remove the affected plugin where possible, especially on sites that allow untrusted accounts. Until a vendor-fixed release is confirmed, restrict subscriber account creation and limit access to invoice print and download functionality.",
  "vendor": "WebToffee",
  "product": "woocommerce_pdf_invoices\\,_packing_slips\\,_delivery_notes_and_shipping_labels",
  "affected": [
    {
      "affected_notes": [],
      "affected_ranges": [
        ">= 0, <= 4.9.8"
      ],
      "ecosystem": null,
      "fixed_versions": [],
      "package_name": "WebToffee WooCommerce PDF Invoices, Packing Slips, Delivery Notes & Shipping Labels",
      "purl": null
    }
  ],
  "cwes": null,
  "cvss_score": 6.5,
  "cvss_src": "other",
  "cvss_vector": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N",
  "epss_score": 0.0087,
  "epss_percentile": 0.5899,
  "epss_asof": "2026-11-09",
  "automation": "deterministic",
  "check": true,
  "check_confidence_basis": "upstream",
  "exploit": false,
  "pipeline_minutes": 0.2305038,
  "t0_at": "2026-08-22T23:27:19.268000+00:00",
  "signals": {
    "check": {
      "at": "2026-11-09T14:26:11.066507+00:00",
      "days": 78.62421063086805,
      "is_lower_bound": false,
      "measured_at": "2026-08-22T23:27:19.268000+00:00",
      "url": null
    },
    "kev": {
      "at": "2026-11-09T00:00:00+00:00",
      "days": 79,
      "is_lower_bound": false,
      "measured_at": "2026-08-22T23:27:19.268000+00:00",
      "precision": "day",
      "url": "https://vulncheck.com/cve/CVE-2026-18027"
    },
    "trigger_signal": {
      "at": "2026-11-09T00:00:00+00:00",
      "days": 78.0226936574074,
      "is_lower_bound": false,
      "measured_at": "2026-08-22T23:27:19.268000+00:00",
      "url": "https://vulncheck.com/cve/CVE-2026-18027"
    }
  }
}

published 2026-11-09 14:25Z
last change 2026-11-11 06:19Z

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