PayPal Pay Now, Buy Now, Donation and Cart Buttons Shortcode <= 1.7 - Contributor+ Stored XSS

Description The plugin does not validate and escape some of its shortcode attributes before outputting them back in a page/post where the shortcode is embed, which could allow users with the contributor role and above to perform Stored Cross-Site Scripting attacks

PoC

[paypal_button type="addtocart" name='name' amount="199: quantity="1-5" add_note="test note" quantity_txt_postfix="test postfix" field_sep=""]