Security researchers have reported that there is a very serious security flaw in Tumblr, the popular website that allows users to sharing everything from photos to music to videos.
This particular threat is serious for users because it allows other Tumblr users to see your authentication"cookies," which can allow an unauthorized individual access to your Tumblr account.
**Tumblr has not commented on this report and has not issued a fix yet. Concerned users should contact Tumblr directly about this vulnerability.
See more about the report from these researchers on Threatpost.com.