Tumblr corrected a vulnerability of his platform, which could leak hidden user information. The information that could leaked included email addresses, encrypted and unencrypted passwords, user locations, and the latest IP addresses from which each user connected.
The vulnerability was in the "Recommended blogs" feature of the Tumblr desktop application, where logged-in users could find blogs that might be of interest to them.
According to official announcement Tumblr "When a blog appeared in the recommended blogs field, using special debugging software, it was possible to view hidden items." The bug was reported through Tumblr's bug bounty program, and was resolved by the team in less than 12 hours.
The company said there were very few cases where this bug could be exploited, and reported that there are no reports indicating that this vulnerability has been used by a malicious user. At the same time, the company says users do not need to make a change.
The reason Tumblr announced that the Bug existed and has now been corrected is because it wants to maintain a "transparency" between the platform and the users. In addition, it has improved its monitoring and analysis of data it has so far, so that in the future it will detect such vulnerabilities sooner.
Tumblr is another social network that has publicly announced some vulnerability lately, just like Facebook and the Google+ where it could have been used or confirmed to have been used.