Zendesk, a company that offers an online support service that other web companies use for their customer services, has reported  in a blog post that a hacker has accessed its system. The vulnerability has since been sealed up, but Zendesk discovered that the hacker accessed support details for three of its customers, and downloaded email addresses of people who'd been contacting their support system.
The three affected services are Twitter , Tumblr  and Pinterest . TheNextWeb  notes that all three of these big-name social media companies have contacted the customers they believe to have been affected, and there's an emphasis that no password information has been compromised.
Earlier this month Facebook  and Apple  revealed that they'd been the target for a serious hacking attack, and in January the New York Times and the Wall Street Journal revealed  they'd been under a sustained attack. The Obama administration is posturing  against the Chinese  military, which is believed to be the source of many attacks on U.S. digital property.