CVE-2026-29204_CVE-2026-29204

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CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N

Description

Insufficient ownership checks in `clientarea.php` allow an authenticated client area user to submit requests using another user’s `addonId` without any ownership validation leading to unauthorized access to the victim's resources and their cPanel account.

Basic Information

ID CVE-2026-29204

Source hackerone

Published May 12, 2026 at 17:46

Affected Product

Vendor WebPros

Product WHMCS

Version 7.4.0

Affected Versions WebPros WHMCS 7.4.0
WebPros WHMCS 9.0.0
WebPros WHMCS 8.13.0

CWE Classification

CWE-639

References

help.whmcs.com /m/125386/l/2073908-cve-2026-29204

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    "lastseen": "",
    "description": "Insufficient ownership checks in `clientarea.php` allow an authenticated client area user to submit requests using another user\u2019s `addonId` without any ownership validation leading to unauthorized access to the victim's resources and their cPanel account.",
    "published": "2026-05-12T17:46:55.152Z",
    "modified": "2026-05-12T17:46:55.152Z",
    "type": "cve",
    "title": "CVE-2026-29204",
    "source": "hackerone",
    "references": "https://help.whmcs.com/m/125386/l/2073908-cve-2026-29204?token=_4RH-0s0febHsrNiC8GdPymsqg3_nSdT",
    "id": "CVE-2026-29204",
    "bulletinFamily": "",
    "cwe": [
        "CWE-639"
    ],
    "cvelist": null,
    "sourceData": "WebPros WHMCS 7.4.0\nWebPros WHMCS 9.0.0\nWebPros WHMCS 8.13.0",
    "sourceHref": "",
    "cvss": {
        "score": 10,
        "severity": "CRITICAL",
        "vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N",
        "version": "3.1"
    },
    "cvss2": [],
    "cvss3": {
        "version": "",
        "vectorString": "",
        "baseScore": 0,
        "baseSeverity": "",
        "attackVector": "",
        "attackComplexity": "",
        "privilegesRequired": "",
        "userInteraction": "",
        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
            "version": "",
            "vectorString": "",
            "baseScore": 0,
            "baseSeverity": "",
            "attackVector": "",
            "attackComplexity": "",
            "privilegesRequired": "",
            "userInteraction": "",
            "scope": "",
            "confidentialityImpact": "",
            "integrityImpact": "",
            "availabilityImpact": ""
        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "WHMCS",
    "version": "7.4.0",
    "vendor": "WebPros",
    "ai_description": "",
    "ai_severity": "",
    "ai_vendor": "",
    "ai_product": "",
    "ai_version": "",
    "ai_score": 0
}