Uber Applied sciences Inc stated it was investigating a cybersecurity incident, after a report that its community was breached, forcing the corporate to close a number of inside communications and engineering techniques.

A hacker compromised an worker’s account on office messaging app Slack and used it to ship a message to Uber workers saying that the corporate had suffered a knowledge breach, in response to a New York Instances report Thursday that cited an Uber spokesperson.

Cybersecurity has been a problem for Uber previously. It suffered a major hack in 2016 that uncovered the private data of about 57 million of its clients and drivers.

Shares of the ride-hailing agency have been down almost 5 % Friday, amid broader U.S. market declines.

It appeared the hacker was capable of acquire entry to different inside techniques, posting an express photograph on an inside data web page for workers, the Instances report added.

“We’re in contact with legislation enforcement and can put up further updates right here as they turn into obtainable,” Uber stated in a tweet, with out offering additional particulars.

The hacker has claimed they’ve gained entry to safety vulnerability data produced by HackerOne for Uber. Such confidential data might be used for additional breaches on the firm.

HackerOne stated they’re “in shut contact with Uber’s safety group, have locked their information down, and can proceed to help with their investigation,” in response to Chris Evans, HackerOne’s Chief Hacking Officer.

Safety researcher Invoice Demirkapi stated screenshots circulating on-line did appear to corroborate the hacker or hackers’ boasts that that they had entry to Uber’s inside techniques.

“This story continues to be growing and these are some excessive claims, however there does seem like proof to help it,” he stated in a message posted to Twitter.

Uber workers have been instructed to not use Slack, which is owned by Salesforce Inc, in response to the report. Different inside techniques have been inaccessible too.

Slack stated in an announcement to Reuters that the corporate was investigating the incident and there was no proof of a vulnerability inherent to its platform.

“I announce I’m a hacker and Uber has suffered a knowledge breach,” the message learn, and went on to record a number of inside databases that have been allegedly compromised, the report added.

An individual assumed accountability for the hack and instructed the paper he had despatched a textual content message to an Uber worker claiming to be a company IT individual.

The employee was persuaded at hand over a password that allowed the hacker to realize entry to Uber’s techniques, the report stated.

Uber Chief Government Officer Dara Khosrowshahi, who took cost a 12 months after the 2016 hack, fired the then chief safety officer, who was later charged with attempting to cowl up the breach.

A U.S. decide final month dismissed the three wire fraud prices in opposition to Joseph Sullivan though he nonetheless faces two prices of obstructing a U.S. Federal Commerce Fee continuing and failing to report a felony.