TinyMCE Custom Styles < 1.1.4 - Admin+ Stored Cross-Site Scripting

2023-06-1900:00:00

Yassir Sbai Fahim

tinymce

custom styles

admin

stored

cross-site scripting

settings

formats dropdown

payload

alert box

page load

0.001 Low

EPSS

Percentile

19.6%

JSON

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. Go to "Settings" »  "TinyMCE Custom Styles" section.

2. In the "2. Manage your custom styles for TinyMCE's Formats dropdown" area under the "Title" and "Type Value" fields add payload: "><script>alert(1);</script>

3. Save all the settings. Load the page,and an alert box with the number "1" will pop up.

0.001 Low

EPSS

Percentile

19.6%

JSON

Related for WPEX-ID:9AFEC4AA-1210-4C40-B566-64E37ACF2B64