The mix-up happened because Bush's team appeared not to have registered his name as a domain name, the website Gizmodo reported.

"It's not clear if Jeb ever owned JebBush.com, which is bizarre, since he's been a high-profile government official for years. According to WHOIS, the domain was registered in 1997, and updated in October 2015," Gizmodo said.



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Yet other political contenders have fallen prey to similar mischief: GOP contender Carly Fiorina also failed to register carlyfiorina.org—which was snapped up by someone who now uses the site to publicize "how many people she laid off" when she sat at the helm of Hewlett-Packard.

The Trump campaign did not immediately reply to CNBC's request for comment.