CVE-2026-87115

validatedZero produced an exploit or a check.

GHSA-x82w-x82x-7998 ↗EUVD-2026-91958 ↗

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.
e4jvikwp VikAppointments Services Booking Calendar <= 1.2.21
CWE-22 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
ETK-2026-431, permanent identifier
+2h34mTTV
1h 16mAI analysisAnalysis: how long the AI spent reversing this signal.
Check if you are vulnerable
timeline
0 = trigger signal
trigger signal (cve.org) +0hcheck available+2h34magent stopped
0
+1h
+2h

description

VikAppointments Services Booking Calendar versions through 1.2.21 can allow unauthenticated attackers to delete files on the WordPress server. This may enable further compromise when a File-type custom field is published through a confirmation-page shortcode.

mitigation

Remove or unpublish File-type custom fields from confirmation-page shortcodes and disable the plugin where this is not possible. Restrict public access to affected booking and confirmation pages until a vendor update is available.

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.
0.88%58th percentile
agent run time
1h 16m
cve.org record, t = 0The moment cve.org publishes the CVE in full.
2026-10-03 06:38Z
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. 2026-10-03 06:38Z
    cve_org: trigger signal, started the run

this entry in the feed

GET /api/v1/feed/CVE-2026-87115

{
  "etk_id": "ETK-2026-431",
  "cve_id": "CVE-2026-87115",
  "display_id": "CVE-2026-87115",
  "ghsa_id": "GHSA-x82w-x82x-7998",
  "euvd_id": "EUVD-2026-91958",
  "status": "published",
  "anchor_state": "anchored",
  "title": "Arbitrary file deletion in VikAppointments Services Booking Calendar",
  "summary": "VikAppointments Services Booking Calendar versions through 1.2.21 can allow unauthenticated attackers to delete files on the WordPress server. This may enable further compromise when a File-type custom field is published through a confirmation-page shortcode.",
  "mitigation": "Remove or unpublish File-type custom fields from confirmation-page shortcodes and disable the plugin where this is not possible. Restrict public access to affected booking and confirmation pages until a vendor update is available.",
  "vendor": "e4jvikwp",
  "product": "VikAppointments Services Booking Calendar",
  "affected": [
    {
      "affected_notes": [],
      "affected_ranges": [
        ">= 0, <= 1.2.21"
      ],
      "ecosystem": null,
      "fixed_versions": [],
      "package_name": "VikAppointments Services Booking Calendar",
      "purl": null
    }
  ],
  "cwes": [
    22
  ],
  "cvss_score": 9.1,
  "cvss_src": "cna_vendor",
  "cvss_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H",
  "epss_score": 0.0088,
  "epss_percentile": 0.585,
  "epss_asof": "2026-10-20",
  "automation": "deterministic",
  "check": true,
  "check_confidence_basis": "differential",
  "exploit": false,
  "pipeline_minutes": 76.32665438333333,
  "t0_at": "2026-10-03T06:38:23.319000+00:00",
  "signals": {
    "check": {
      "at": "2026-10-03T09:11:54.765878+00:00",
      "days": 0.10661396849537037,
      "is_lower_bound": false,
      "measured_at": "2026-10-03T06:38:23.319000+00:00",
      "url": null
    },
    "trigger_signal": {
      "at": "2026-10-03T06:38:23.319000+00:00",
      "days": 0,
      "is_lower_bound": false,
      "measured_at": "2026-10-03T06:38:23.319000+00:00",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-87115"
    }
  }
}

published 2026-10-03 07:55Z
last change 2026-10-21 05:31Z

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.