CVE-2026-75957

{
  "etk_id": "ETK-2026-221",
  "cve_id": "CVE-2026-75957",
  "display_id": "CVE-2026-75957",
  "ghsa_id": "GHSA-xr7j-wm8w-c5p4",
  "euvd_id": "EUVD-2026-90546",
  "status": "published",
  "anchor_state": "anchored",
  "title": "Authentication bypass in Ultimate Multisite WordPress plugin",
  "summary": "Ultimate Multisite for WordPress is affected through version 2.15.0. An unauthenticated attacker may obtain a login session for an existing WordPress account, potentially including a network administrator account, when that account has no Ultimate Multisite customer record.",
  "mitigation": "Disable the Ultimate Multisite plugin on affected sites until the supplier provides an update; no fixed version is recorded. Review affected accounts and active sessions, especially privileged accounts without associated customer records.",
  "vendor": "superdav42",
  "product": "Ultimate Multisite – WordPress Multisite SaaS & WaaS Platform",
  "affected": [
    {
      "affected_notes": [],
      "affected_ranges": [
        ">= 0, <= 2.15.0"
      ],
      "ecosystem": null,
      "fixed_versions": [],
      "package_name": "Ultimate Multisite – WordPress Multisite SaaS & WaaS Platform",
      "purl": null
    }
  ],
  "cwes": [
    287
  ],
  "cvss_score": 9.8,
  "cvss_src": "cna_vendor",
  "cvss_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
  "epss_score": 0.0058,
  "epss_percentile": 0.4647,
  "epss_asof": "2026-10-20",
  "automation": "deterministic",
  "check": true,
  "check_confidence_basis": "differential",
  "exploit": false,
  "pipeline_minutes": 27.92326425,
  "t0_at": "2026-10-01T07:40:23.541000+00:00",
  "signals": {
    "check": {
      "at": "2026-10-01T10:29:57.917627+00:00",
      "days": 0.11775898873842593,
      "is_lower_bound": false,
      "measured_at": "2026-10-01T07:40:23.541000+00:00",
      "url": null
    },
    "trigger_signal": {
      "at": "2026-10-01T07:40:23.541000+00:00",
      "days": 0,
      "is_lower_bound": false,
      "measured_at": "2026-10-01T07:40:23.541000+00:00",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-75957"
    }
  }
}