Uzbey: XSS in 3rd party plugin (not affecting Uzbey's users)

Uzbey currently using a 3rd party solution from sharethis.com to share user's album. It is possible to use this function as a medium to attack sharethis.com's users that using Uzbey service. 1- Create album using XSS payload 2- Share the album using Email function letter icon 3- XSS will execute...