Privilege escalation in Uix Usercenter
CVE-2026-16259
The Uix UserCenter WordPress plugin through 1.0.3 does not verify that the account being modified through an unauthenticated profile-update action belongs to the requester, and it authenticates that action with a token whose signing key is hardcoded and identical across every install, allowing unauthenticated attackers to forge a token for any user, overwrite an administrator's email and password, and take over the account.
Vulnerability class: Privilege Escalation
EPSS: 0.001 (3.4th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Unknown Uix Usercenter
Weakness classification (CWE)
References
- contact@wpscan.com (technical-description, exploit, vdb-entry)
Frequently asked questions
- What is CVE-2026-16259?
- CVE-2026-16259 is a critical-severity vulnerability in Uix Usercenter, classified under Improper Privilege Management. CVSS score: 9.8/10. Published 2026-08-29.
- How severe is CVE-2026-16259?
- Critical severity. CVSS v3 base score is 9.8 out of 10.