CVE-2026-29204 — CRITICAL (9.1)

Vulnerability 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.

CVSS Score

9.1

CRITICAL

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

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

HIGH

Integrity

HIGH

Availability

NONE

Related Weaknesses (CWE)

CWE-639

References

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

FAQ

What is CVE-2026-29204?

CVE-2026-29204 is a vulnerability with a CVSS score of 9.1 (CRITICAL). 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 acc...

How severe is CVE-2026-29204?

CVE-2026-29204 has been rated CRITICAL with a CVSS base score of 9.1/10. This is considered a critical vulnerability requiring immediate attention.

Is there a patch for CVE-2026-29204?

Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.