Customer service software supplier Zendesk has been hacked, leaking email addresses of Twitter, Tumblr and Pinterest users.
Zendesk CEO Mikkel Svane admitted a hacker breached the company’s security this week, gaining access to support information of three customers.
“We have an investigation under way and do not have the answer to every question,” Svane said in a blog post.
“We are also completely committed to working with authorities to bring anyone involved to justice and make certain we fully understand what happened.”
Svane said the vulnerability that let the hacker in has now been patched.
Various reports confirmed Twitter, Tumblr and Pinterest were the three affected customers, after the companies sent notifications to their users. There was no indication passwords were stolen, but investigations are ongoing.
“As this process unfolds, we aim to update our customers in as transparent and timely a manner as possible about new developments,” Zendesk’s Svane added.
Zendesk has a host of big clients, including Vodafone, MTV and Yammer.
Twitter will be particularly unhappy at yet another security even impacting it. A host of high-profile Twitter accounts have been hacked this month, and the company itself admitted it had been breached, potentially affecting 250,000 users.
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