She was taken to hospital where medical staff tried to save her life but she was pronounced dead shortly afterwards.
An autopsy will be carried out today.
Caserta was on the season that featured Brad Womack but he sent her home in the first week.
Caserta's LinkedIn page reveals she was working as corporate counsel at MedPro Healthcare Staffing.
Stephen Carbone, the blogger behind the Bachelor fan site Reality Steve, paid tribute to Caserta on Twitter.
"Sick to my stomach to see that Cristy Caserta from Brad Womack's 2nd season has suddenly passed away," he tweeted. "Cristy was always there to give me legal advice in the past. I'm at a loss after seeing people post on her FB. Just spoke a couple weeks ago. RIP my friend."