CVE-2023-1166: Ultimatelysocial Usm Premium

Medium severity, CVSS 4.8. EPSS: 0.5% chance of exploitation in the next 30 days.

The USM-Premium WordPress plugin before 16.3 does not sanitize and escape some of its settings, which could allow high-privilege users such as admin to perform Stored Cross-Site Scripting attacks even when the unfiltered_html capability is disallowed (for example, in multisite setup).

Affected products

• Ultimatelysocial Usm Premium: before 16.3 (fixed in 16.3)

Published 2023-06-27. Last modified 2026-06-17.