Hurley was reportedly not even invited to the event at AT&T Park in San Francisco, as West and Kardashian alleged in court documents filed on Thursday in Los Angeles Superior Court that Hurley "tagged along with someone who was invited."
According to E! News, Hurley was only allowed to stay after signing a confidentiality agreement which prohibited him from posting and videos or photos of the night. West allegedly only allowed an E!-affiliated camera crew to shoot the engagement in case the pair decide to showcase the event on an upcoming episode of Keeping Up with the Kardashians.
"Exclusive rights, such as those sold by plaintiffs to publication of video of the event, are particularly valuable," the lawsuit reportedly states. "If people violate these rights... they are of substantially diminished value."
Kardashian and West are therefore reportedly seeking an unspecified amount in damages for alleged breach of contract, fraud and unjust enrichment.
TMZ reported that Kardashian attacked Hurley in the lawsuit by saying he is desperate to find a "second act" after his last two startups have failed following his success with YouTube, which Google purchased the company for $1.65 billion in 2006.
"Hurley proceeded to try to turn the event into one starring himself, broadcasting the images he knew were the exclusive property rights of someone else," Kardashian reportedly said.
Hurley also tweeted his Twitter followers -- which number nearly a million -- letting them know he had posted the fuzzy engagement video on MixBit, which later prompted numerous other media sites to pick it up and attribute the clip to his website.
In addition, according to TMZ, Hurley issued a press release, hyping up his video post even further.