{
  "id": "CVE-2026-41940",
  "url": "https://spydr.io/cve/CVE-2026-41940",
  "published": "2026-04-29T16:16:25.037Z",
  "modified": "2026-09-30T18:18:18.563Z",
  "score": 9.3,
  "severity": "critical",
  "cvss_version": "4.0",
  "vector": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
  "score_source": "vulncheck.com",
  "epss": 0.98527,
  "epss_percentile": 0.9992,
  "exploited": true,
  "kev": {
    "added": "2026-04-30",
    "due": "2026-05-03",
    "action": "Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.",
    "ransomware": "Known",
    "name": "WebPros cPanel & WHM and WP2 (WordPress Squared) Missing Authentication for Critical Function Vulnerability",
    "notes": "https://support.cpanel.net/hc/en-us/articles/40073787579671-cPanel-WHM-Security-Update-04-28-2026 ; https://docs.cpanel.net/release-notes/release-notes/ ; https://docs.wpsquared.com/changelogs/versions/changelog/#13617 ; https://nvd.nist.gov/vuln/detail/CVE-2026-41940\""
  },
  "ssvc_exploitation": "active",
  "vendors": [
    "WebPros"
  ],
  "products": [
    "WebPros cPanel",
    "WebPros WP Squared",
    "WebPros WHM"
  ],
  "cwes": [
    "CWE-306"
  ],
  "description": "cPanel and WHM versions after 11.40 contain an authentication bypass vulnerability in the login flow that allows unauthenticated remote attackers to gain unauthorized access to the control panel.",
  "status": "Analyzed",
  "score_type": "Secondary",
  "scores": {
    "cvss_v40": 9.3,
    "cvss_v31": 9.8,
    "cvss_v30": null
  },
  "references": [
    {
      "url": "https://docs.cpanel.net/release-notes/release-notes",
      "tags": [
        "Release Notes"
      ]
    },
    {
      "url": "https://docs.wpsquared.com/changelogs/versions/changelog/#13617",
      "tags": [
        "Release Notes"
      ]
    },
    {
      "url": "https://support.cpanel.net/hc/en-us/articles/40073787579671-cPanel-WHM-Security-Update-04-28-2026",
      "tags": [
        "Vendor Advisory"
      ]
    },
    {
      "url": "https://www.namecheap.com/status-updates/ongoing-critical-security-vulnerability-in-cpanel-april-28-2026",
      "tags": [
        "Third Party Advisory"
      ]
    },
    {
      "url": "https://www.vulncheck.com/advisories/cpanel-and-whm-authentication-bypass-via-login-flow",
      "tags": [
        "Third Party Advisory"
      ]
    },
    {
      "url": "https://labs.watchtowr.com/the-internet-is-falling-down-falling-down-falling-down-cpanel-whm-authentication-bypass-cve-2026-41940/",
      "tags": [
        "Exploit",
        "Third Party Advisory"
      ]
    },
    {
      "url": "https://www.bleepingcomputer.com/news/security/critrical-cpanel-flaw-mass-exploited-in-sorry-ransomware-attacks/",
      "tags": [
        "Press/Media Coverage"
      ]
    },
    {
      "url": "https://github.com/watchtowrlabs/watchTowr-vs-cPanel-WHM-AuthBypass-to-RCE.py",
      "tags": [
        "Exploit",
        "Third Party Advisory"
      ]
    },
    {
      "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-41940",
      "tags": [
        "US Government Resource"
      ]
    }
  ],
  "nvd_url": "https://nvd.nist.gov/vuln/detail/CVE-2026-41940",
  "covered_in": [],
  "attribution": [
    {
      "source": "NVD",
      "url": "https://nvd.nist.gov",
      "notice": "This product uses data from the NVD API but is not endorsed or certified by the NVD."
    },
    {
      "source": "CISA KEV",
      "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog",
      "notice": "Known exploited vulnerabilities from the CISA KEV catalog."
    },
    {
      "source": "FIRST EPSS",
      "url": "https://www.first.org/epss",
      "notice": "Exploit prediction scores from FIRST EPSS."
    }
  ]
}