FooBox (Free and Premium) < 2.7.28 - Admin+ Stored XSS

2024-05-2800:00:00

Dmitrii Ignatyev

foobox

premium

vulnerability

update

xss

7.8 High

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).

Go to settings and change the "Specific CSS classes" field to 123"</script><img src=x onerror=alert(1)>alert(1) (Admins and editors are allowed to use JS in posts/pages/comments/etc, so the unfiltered_html capability should be disallowed when testing for Stored XSS using such roles)