CVE-2026-29204

CVSS 9.1 CRITICALEPSS 0.3%CWE-639

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

Affected products

WebPros · WHMCS

public PoCs found — 1

githubgithub.com/bogdanrotariu/cve-2026-29204-whmcs-clientarea-addonid★ 0

⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.

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References

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