The WP-UserOnline WordPress plugin before 2.88.3 does not sanitise and escape the X-Forwarded-For header before outputting its content on the page, which allows unauthenticated users to perform Cross-Site Scripting attac…
CVSS 3.1MEDIUM 6.1·Network·No auth·User interaction·EPSS 0.0051·Published 2023-11-27·Fixed in 2.88.3CWE-79