Stack Overflow was under attack. There is currently no evidence about any breach of customer or user data

Stack Overflow is the Internet’s largest IT technical Q&A site for programming and development related topics. It is a privately held website, the flagship site of the Stack Exchange Network, created in 2008 by Jeff Atwood and Joel Spolsky. It features questions and answers on a wide range of topics in computer programming. It was created to be a more open alternative to earlier question and answer sites such as Experts-Exchange. The name for the website was chosen by voting in April 2008 by readers of Coding Horror, Atwood’s popular programming blog.

In a brief announcement posted on its official website, Mary Ferguson, vice president of Stack Overflow engineering, wrote: “Over the weekend, there was an attack on Stack Overflow. We have confirmed that some level of production access was gained on May 11. We discovered and investigated the extent of the access and are addressing all known vulnerabilities. We have not identified any breach of customer or user data. Our customers’ and users’ security is of the utmost importance to us. After we conclude our investigation cycle, we will provide more information.“