Popup Builder < 4.2.0 - Admin+ Stored Cross-Site Scripting

2023-08-3000:00:00

Dipak Panchal (th3.d1pak)

popup builder

admin+

stored xss

cross-site scripting

wordpress exploit

EPSS

0.001

Percentile

20.8%

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). Note: The vendor was made aware of the issue on June 14 and 28, 2023

1. Click on "Add New", and select the image popup.
2. Navigate to "Settings" and enable the "Floating Button" option.
3. Enter the XSS payload in the Text field: `<a href=javascript:alert(document.cookie)>Click Here</a>`
4. Clicking on the button will get the popup. This XSS payload works on WordPress Admin.

EPSS

0.001

Percentile

20.8%

JSON

Related for WPEX-ID:941A9AA7-F4B2-474A-84D9-9A74C99079E2