This story was updated most recently at 2:29 p.m. ET on June 20.
Not good, Yo.
Yo, a messaging app for iPhone and Android that simply lets users send the word "yo," has been hacked just days after it first gained mainstream attention.
Or Arbel, the app's creator, confirmed to Mashable that "a few guys tried to hack" the app overnight and "did succeed to some extent." Yo is now working to resolve the issue.
We working on the securities issues that came to our attention. We want you to know we take this very seriously.— Yo (@YoAppStatus) June 20, 2014
TechCrunch reports that it received an email from a college student who claimed to have worked with two of his roommates to hack the app, gaining access to users' phone numbers as well as the ability to "spoof Yo's from any users."
Arbel told Mashable that he talked with the people responsible for the hack and "they actually helped me to close the issue." Yo is also working with Parse to fix the remaining issues.
Yo, I've been hacked http://t.co/Il1TGRS653 pic.twitter.com/HyFS8jy5TA— Derek Ross (@derekmross) June 20, 2014
Even so, Arbel and his team clearly have their work cut out for them as more developers raised concerns Friday afternoon about security flaws:
I predict Yo will be offline by the end of the day if not sooner. To fix the vulnerability for good will require a whole new app update— Jonathan Wegener (@jwegener) June 20, 2014
a bot that crawls twitter handles on http://t.co/qwBuWZ4TBj and tweets phone numbers— Andrew Cove (@aac) June 20, 2014
The Yo app launched quietly in April, but gained a tremendous amount of attention this week after The Financial Times reported that it had raised $1 million in funding simply to let users send "Yo" to one another.
Arbel previously told Mashable that he initially thought the idea -- suggested to him by the CEO of Mobli -- was "silly," but he eventually came around to it and built the initial version of the app in eight hours. Based on today's security issue, the app likely needs a little more work, to say the least.
"When you get to #1 in the App Store, you get a lot of fire," Arbel said on Friday. "Other people are going to try to hack you to get noticed. It happens."
When asked if he thinks this incident will hurt Yo's momentum, Arbel declined to provide a firm answer. "We can just let time tell the story," he said. "I really can't predict anything."