Frontend Checklist <= 2.3.2 - Admin+ Stored XSS via Items

2024-06-0500:00:00

Bob Matyas

frontend

checklist

stored xss

vulnerability

shortcode

exploit

5.7 Medium

AI Score

Confidence

High

0.0004 Low

EPSS

Percentile

9.1%

JSON

Description The plugin does not sanitise 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)

1. Add a checklist and for an item, enter `<script>alert(999)</script>`
2. Display the checklist via shortcode and view on the frontend to see the XSS