CVE-2026-29204

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.

Affected

WebPros · WHMCS

CVSS v3.1 HACKERONE

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

EPSS

0.45% chance of exploitation in the next 30 days, 38th percentile

Published

2026-05-12

Proof-of-concept exploits (1)

• bogdanrotariu/cve-2026-29204-whmcs-clientarea-addonid0★ · 2026-05-13

References

• CVE Record
• NVD entry