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CVE-2026-116557

CVE-2026-116557

validatedZero produced an exploit or a check.

EUVD-2026-114610 ↗

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.
murgroland WP Booking System – Booking Calendar <= 2.1.0.5
CWE-862 Missing Authorization
ETK-2026-3152Zero's internal tracking ID, independent of the CVE number., permanent identifier
cvss9.1cna vendorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
+17mTTV
<1mAI analysisAnalysis: how long the AI spent reversing this signal.
Check if you are vulnerable
timeline
0 = trigger signal
trigger signal (cve.org) +0mcheck available+17magent stopped
0
+5min
+10min
+15min

description

WP Booking System – Booking Calendar through version 2.1.0.5 lacks an authorization check when removing calendar notes. An authenticated user with Subscriber-level access or higher can delete notes from arbitrary calendars. Exploitation requires a valid WordPress account with at least Subscriber permissions.

mitigation

Restrict or remove Subscriber-level accounts that are not needed, and limit access to the affected plugin while awaiting a vendor update. Review calendar notes and WordPress account permissions for unauthorized changes.

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.
2026-10-31 06:44Z
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. 2026-10-31 06:44Z
    cve_org: trigger signal, started the run
    https://www.cve.org/CVERecord?id=CVE-2026-116557
  2. 2026-10-31 07:01Z

this entry in the feed

GET /api/v1/feed/CVE-2026-116557

{
  "etk_id": "ETK-2026-3152",
  "cve_id": "CVE-2026-116557",
  "display_id": "CVE-2026-116557",
  "ghsa_id": null,
  "euvd_id": "EUVD-2026-114610",
  "status": "published",
  "anchor_state": "anchored",
  "title": "Missing authorization in WP Booking System calendar notes",
  "summary": "WP Booking System – Booking Calendar through version 2.1.0.5 lacks an authorization check when removing calendar notes. An authenticated user with Subscriber-level access or higher can delete notes from arbitrary calendars. Exploitation requires a valid WordPress account with at least Subscriber permissions.",
  "mitigation": "Restrict or remove Subscriber-level accounts that are not needed, and limit access to the affected plugin while awaiting a vendor update. Review calendar notes and WordPress account permissions for unauthorized changes.",
  "vendor": "murgroland",
  "product": "WP Booking System – Booking Calendar",
  "affected": [
    {
      "affected_notes": [],
      "affected_ranges": [
        ">= 0, <= 2.1.0.5"
      ],
      "ecosystem": null,
      "fixed_versions": [],
      "package_name": "WP Booking System – Booking Calendar",
      "purl": null
    }
  ],
  "cwes": [
    862
  ],
  "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": null,
  "epss_percentile": null,
  "epss_asof": null,
  "automation": "deterministic",
  "check": true,
  "check_confidence_basis": "upstream",
  "exploit": false,
  "pipeline_minutes": 0.26157071666666665,
  "t0_at": "2026-10-31T06:44:21.690000+00:00",
  "signals": {
    "check": {
      "at": "2026-10-31T07:01:01.719107+00:00",
      "days": 0.011574410960648148,
      "is_lower_bound": false,
      "measured_at": "2026-10-31T06:44:21.690000+00:00",
      "url": null
    },
    "trigger_signal": {
      "at": "2026-10-31T06:44:21.690000+00:00",
      "days": 0,
      "is_lower_bound": false,
      "measured_at": "2026-10-31T06:44:21.690000+00:00",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-116557"
    }
  }
}

published 2026-10-31 07:00Z
last change 2026-10-31 08:04Z

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