CVE-2026-108123

validatedZero produced an exploit or a check.

GHSA-2wvw-mp72-5fwj ↗EUVD-2026-103228 ↗

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 <= 2.1.0.3
ETK-2026-1887Zero's internal tracking ID, independent of the CVE number., permanent identifier
+10h28mTTV
35mAI analysisAnalysis: how long the AI spent reversing this signal.
Check if you are vulnerable
timeline
0 = trigger signal
trigger signal (cve.org) +0hcheck available+10h28magent stopped
0
+2h
+4h
+6h
+8h

description

WP Booking System – Booking Calendar through version 2.1.0.3 may allow unauthorized access to booking notification email content, including customer personal information. The advisory gives conflicting access requirements, but indicates that a WordPress Subscriber-level account can reach the affected functionality.

mitigation

Deactivate the plugin until a vendor-fixed release is confirmed. Restrict self-registration and remove untrusted Subscriber accounts to reduce exposure if the plugin must remain active.

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.
0.32%23rd percentile
agent run time
35m
cve.org record, t = 0The moment cve.org publishes the CVE in full.
2026-10-17 03:43Z
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. 2026-10-17 03:43Z
    ghsa: trigger signal, started the run
  2. 2026-10-17 03:43Z

this entry in the feed

GET /api/v1/feed/CVE-2026-108123

{
  "etk_id": "ETK-2026-1887",
  "cve_id": "CVE-2026-108123",
  "display_id": "CVE-2026-108123",
  "ghsa_id": "GHSA-2wvw-mp72-5fwj",
  "euvd_id": "EUVD-2026-103228",
  "status": "published",
  "anchor_state": "anchored",
  "title": "Authorization bypass in WP Booking System – Booking Calendar",
  "summary": "WP Booking System – Booking Calendar through version 2.1.0.3 may allow unauthorized access to booking notification email content, including customer personal information. The advisory gives conflicting access requirements, but indicates that a WordPress Subscriber-level account can reach the affected functionality.",
  "mitigation": "Deactivate the plugin until a vendor-fixed release is confirmed. Restrict self-registration and remove untrusted Subscriber accounts to reduce exposure if the plugin must remain active.",
  "vendor": "murgroland",
  "product": "WP Booking System – Booking Calendar",
  "affected": [
    {
      "affected_notes": [],
      "affected_ranges": [
        ">= 0, <= 2.1.0.3"
      ],
      "ecosystem": null,
      "fixed_versions": [],
      "package_name": "WP Booking System – Booking Calendar",
      "purl": null
    }
  ],
  "cwes": null,
  "cvss_score": 7.5,
  "cvss_src": "cna_vendor",
  "cvss_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
  "epss_score": 0.0032,
  "epss_percentile": 0.2326,
  "epss_asof": "2026-10-20",
  "automation": "deterministic",
  "check": true,
  "check_confidence_basis": "differential",
  "exploit": false,
  "pipeline_minutes": 34.87468945,
  "t0_at": "2026-10-17T03:43:29.401000+00:00",
  "signals": {
    "check": {
      "at": "2026-10-17T14:11:32.915827+00:00",
      "days": 0.43615179197916665,
      "is_lower_bound": false,
      "measured_at": "2026-10-17T03:43:29.401000+00:00",
      "url": null
    },
    "trigger_signal": {
      "at": "2026-10-17T03:43:29.401000+00:00",
      "days": 0,
      "is_lower_bound": false,
      "measured_at": "2026-10-17T03:43:29.401000+00:00",
      "url": "https://github.com/advisories/GHSA-2wvw-mp72-5fwj"
    }
  }
}

published 2026-10-17 13:36Z
last change 2026-10-21 11:38Z

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