Description
Insufficient ownership check in `clientarea.php` allows 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 account.
Published: 2026-05-12
Score: 9.1 Critical
EPSS: < 1% Very Low
KEV: No
AI Analysis

Analysis and contextual insights are available on OpenCVE Cloud.

Remediation

No solution or workaround provided in the CVE record.

Additional remediation guidance may be available on OpenCVE Cloud.

Tracking

Sign in to view the affected projects.

Advisories

No advisories yet.

History

Wed, 13 May 2026 13:00:00 +0200

Type Values Removed Values Added
First Time appeared Webpros
Webpros whmcs
Vendors & Products Webpros
Webpros whmcs

Wed, 13 May 2026 02:30:00 +0200

Type Values Removed Values Added
Title Unauthorized cPanel Access via Missing Addon ID Ownership Verification in WHMCS

Wed, 13 May 2026 00:30:00 +0200


Wed, 13 May 2026 00:15:00 +0200

Type Values Removed Values Added
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. Insufficient ownership check in `clientarea.php` allows 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 account.
References
Metrics cvssV3_1

{'score': 10, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N'}

ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

cvssV3_1

{'score': 9.1, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N'}


Tue, 12 May 2026 23:00:00 +0200

Type Values Removed Values Added
Title Unauthorized cPanel Access via Missing Addon ID Ownership Verification in WHMCS

Tue, 12 May 2026 20:15:00 +0200

Type Values Removed Values Added
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.
Weaknesses CWE-639
References
Metrics cvssV3_1

{'score': 10, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N'}


cve-icon MITRE

Status: PUBLISHED

Assigner: hackerone

Published:

Updated: 2026-05-12T21:57:08.277Z

Reserved: 2026-03-04T15:00:09.267Z

Link: CVE-2026-29204

cve-icon Vulnrichment

Updated: 2026-05-12T21:12:59.156Z

cve-icon NVD

Status : Deferred

Published: 2026-05-12T18:16:51.030

Modified: 2026-10-26T18:10:00.173

Link: CVE-2026-29204

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-05-13T12:37:50Z

Weaknesses
  • CWE-639

    Authorization Bypass Through User-Controlled Key