CVE-2026-16259: Unknown Uix Usercenter

Critical severity, CVSS 9.8. EPSS: 0.3% chance of exploitation in the next 30 days.

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.

Affected products

• Unknown Uix Usercenter: up to and including 1.0.3

Published 2026-08-29. Last modified 2026-08-31.