Slickr Flickr <= 2.8.1 - Admin+ Stored Cross-Site Scripting

The plugin does not sanitise and escape its settings, allowing high privilege users such as admin to perform cross-Site Scripting attacks even when the unfiltered_html capability is disallowed.

PoC

Open the plugin and intercept the request using burpsuite. Give the below payload in the parameter “flickr_id” and submit the request. xss"/>//xss The stored XSS will be triggered whenever the user visits the page.