title: WP-UserOnline < 2.88.3 - Unauthenticated Stored XSS
description: 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 attacks.
problem types: CWE-79 Cross-Site Scripting (XSS)
affected:
{
vendor: Unknown
product: WP-UserOnline
versions:
status: affected, versionType: semver, version: 0, lessThan: 2.88.3
defaultStatus: unaffected
collectionURL: https://wordpress.org/plugins
}