FormCraft < 1.2.7 - Admin+ Stored XSS

2023-08-0200:00:00

Sayandeep Dutta

formcraft

stored xss

custom messages

add email

xss exploit

6 Medium

AI Score

Confidence

High

0.0004 Low

EPSS

Percentile

14.0%

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).

There are two XSS issues:

Example A:

1. Create a new form.
2. Go to settings and then to custom messages.
3. In form sent replace message sent with <script>alert(1)</script> payload.

Example B:

1. Go to add field and then add email.
2. In label change your email to <script>alert(1)</script> payload
3. Now return to your submissions and click on the recent submission you made to see the XSS.