HipChat has reset all its users ' passwords after what it called a security incident that may have exposed Attack.Databreach their names , email addresses and hashed password information . In some cases , attackers may have accessed Attack.Databreach messages and content in chat rooms , HipChat said in a Monday blog post . But this happened in no more than 0.05 percent of the cases , each of which involved a domain URL , such as company.hipchat.com . HipChat did n't say how many users may have been affected by the incident . The passwords that may have been exposed Attack.Databreach would also be difficult to crack , the company said . The data is hashed , or obscured , with the bcrypt algorithm , which transforms the passwords into a set of random-looking characters . For added security , HipChat `` salted '' each password with a random value before hashing it . HipChat warned that chat room data including the room name and topic may have also been exposed Attack.Databreach . But no financial or credit information was taken Attack.Databreach , the company said . HipChat is a popular messaging service used among enterprises , and an attack Attack.Databreach that exposed Attack.Databreach sensitive work-related chats could cause significant harm . The service , which is owned by Atlassian , said it detected the security incident last weekend . It affected Vulnerability-related.DiscoverVulnerability a server in the HipChat Cloud and was caused by a vulnerability in an unnamed , but popular , third-party library that HipChat.com used , the company said . No other Atlassian systems were affected , the company said . “ We are confident we have isolated the affected systems and closed any unauthorized access , ” HipChat said in its blog post . This is not the first time the messaging service has faced problems keeping accounts secure . In 2015 , HipChat reset user passwords after detecting and blocking suspicious activity in which account information was stolen Attack.Databreach from less than 2 percent of its users . When breaches occur , security experts advise users to change their passwords for any accounts where they used the same login information . Users can consider using a password manager to help them store complex , tough-to-memorize passwords . HipChat has already sent an email to affected users , informing them of the password reset . In 2015 , rival chat application Slack reported its own breach , and as a result rolled out two-factor authentication to beef up its account security . HipChat does not offer two-factor authentication .