Versions up to and including 1.8.19 are vulnerable and could be affected by this. We therefore recommend users install the 1.8.20 update:
http://www.gravityhelp.com/gravity-forms-v1-8-20-released/
by Technical Team,
World Class Web Hosting Provider in Pakistan
WebSouls - A Company of Future Souls Group
Wednesday, May 6, 2015