CVE-2026-66439

validatedZero produced an exploit or a check.

GHSA-rg2q-cc6c-qfpr ↗EUVD-2026-53881 ↗

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.+68d
berocket advanced_ajax_product_filters >= n/a, <= 3.2.0.3
ETK-2026-1980Zero's internal tracking ID, independent of the CVE number., permanent identifier
+73dTTV
31mAI analysisAnalysis: how long the AI spent reversing this signal.
Check if you are vulnerable
timeline
0 = cve.org publication
cve.org publicationtrigger signal +67dkev+68dcheck available+73dagent stopped
0
+20d
+40d
+60d
+80d

description

Advanced AJAX Product Filters versions through 3.2.0.3 are affected by an unauthenticated cross-site scripting issue. An unauthenticated attacker may cause script to execute in a victim's browser when the victim interacts with attacker-controlled content.

mitigation

Disable the affected plugin or restrict public access to sites using it until a vendor-confirmed fixed release is available. Upgrade promptly once the vendor publishes a release that addresses this issue.

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.
0.25%15th percentile
agent run time
31m
cve.org record, t = 0The moment cve.org publishes the CVE in full.
2026-08-06 14:27Z
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.
+68d

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. 2026-08-06 14:27Z
  2. 2026-10-13
    vulncheck_kev: trigger signal, started the run
  3. 2026-10-13 00:00Z

this entry in the feed

GET /api/v1/feed/CVE-2026-66439

{
  "etk_id": "ETK-2026-1980",
  "cve_id": "CVE-2026-66439",
  "display_id": "CVE-2026-66439",
  "ghsa_id": "GHSA-rg2q-cc6c-qfpr",
  "euvd_id": "EUVD-2026-53881",
  "status": "published",
  "anchor_state": "anchored",
  "title": "Unauthenticated cross-site scripting in Advanced AJAX Product Filters",
  "summary": "Advanced AJAX Product Filters versions through 3.2.0.3 are affected by an unauthenticated cross-site scripting issue. An unauthenticated attacker may cause script to execute in a victim's browser when the victim interacts with attacker-controlled content.",
  "mitigation": "Disable the affected plugin or restrict public access to sites using it until a vendor-confirmed fixed release is available. Upgrade promptly once the vendor publishes a release that addresses this issue.",
  "vendor": "berocket",
  "product": "advanced_ajax_product_filters",
  "affected": [
    {
      "affected_notes": [
        ">= n/a, <= 3.2.0.3"
      ],
      "affected_ranges": [],
      "ecosystem": null,
      "fixed_versions": [],
      "package_name": "woocommerce-ajax-filters",
      "purl": null
    }
  ],
  "cwes": null,
  "cvss_score": 7.1,
  "cvss_src": "other",
  "cvss_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L",
  "epss_score": 0.0025,
  "epss_percentile": 0.1558,
  "epss_asof": "2026-10-20",
  "automation": "deterministic",
  "check": true,
  "check_confidence_basis": "differential",
  "exploit": false,
  "pipeline_minutes": 30.81283245,
  "t0_at": "2026-08-06T14:27:49.297000+00:00",
  "signals": {
    "check": {
      "at": "2026-10-18T15:12:26.206526+00:00",
      "days": 73.03098274914352,
      "is_lower_bound": false,
      "measured_at": "2026-08-06T14:27:49.297000+00:00",
      "url": null
    },
    "kev": {
      "at": "2026-10-13T00:00:00+00:00",
      "days": 68,
      "is_lower_bound": false,
      "measured_at": "2026-08-06T14:27:49.297000+00:00",
      "precision": "day",
      "url": "https://vulncheck.com/cve/CVE-2026-66439"
    },
    "trigger_signal": {
      "at": "2026-10-13T00:00:00+00:00",
      "days": 67.39734609953703,
      "is_lower_bound": false,
      "measured_at": "2026-08-06T14:27:49.297000+00:00",
      "url": "https://vulncheck.com/cve/CVE-2026-66439"
    }
  }
}

published 2026-10-18 14:41Z
last change 2026-10-21 08:40Z

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