Tumblr urged users to download an important update for its iOS apps on Tuesday , after a `` security vulnerability '' put passwords at risk . `` We have just released a very important security update for our iPhone and iPad apps addressing an issue that allowed passwords to be compromised in certain circumstances , '' Derek Gottfrid , the blogging platform 's vice-president of product , said in a blog post . In a footnote , Gottfrid elaborated that passwords were `` sniffed '' or detected while in transit on certain versions of the app . The company also advised users of its iOS apps to update their passwords on Tumblr , as well as `` anywhere else you may have been using the same password . '' In an e-mailed statement , spokesperson Katherine Barna told Mashable that Tumblr was notified of a `` security vulnerability '' in its iOS app earlier Tuesday . `` We immediately released an update that repairs the issue and are notifying affected users . We obviously take these incidents very seriously and deeply regret this error , '' Barna said . She did not provide further details on the security issue . Those using Tumblr 's iOS apps can head to Apple 's App Store to download the security fix . In May , Yahoo announced that it reached an agreement to acquire Tumblr . The deal was completed last month . Were you affected by Tumblr 's security problem ? Tell us in the comments , below .
Tumblr advises users of its iOS apps to change their passwords . Security hole ` ` for passwords to be compromised in certain circumstances '' Users of Tumblr 's iPhone , iPad apps can download a security fix from App Store .