Popular social news and media aggregation website Reddit.com suffered a security breach, the website announced Wednesday.

A post made by the site’s founding engineer Christopher Slowe stated that a hacker broke into a few of the website’s systems and accessed some user data, “including some current email addresses and a 2007 database backup containing old salted and hashed passwords.”

The breach happened between June 14 and 18, and was discovered on June 19, according to the post.

Slowe said that the hacker did not gain “write access to Reddit systems.”

The user information that was accessed affects only users who created accounts between the site’s launch in 2005 and May 2007. 

“In Reddit’s first years, it had many fewer features, so the most significant data contained in this backup are account credentials (username + salted hashed, passwords), email addresses, and all content (mostly public, but also private messages) from way back then,” Slowe said.

Users will be receiving messages from Reddit officials if their information was accessed.