CVE-2023-5560

PoC —

CVSS 3.1

6.1 medium

EPSS

<1%p42

Published

Nov 27, 2023 (Nov 27, 2023)

Modified

Jun 17, 2026

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.

Vendors: lesterchan
Products: wp-useronline
Ecosystems: WordPress
Weakness: CWE-79
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

NVD CVE.org GitHub PoCs EPSS (0.5%)

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