Kinotopic, a photograph enhancement app for the iPhone, has been discontinued for approximately three years—yet a security researcher has discovered an unsecured database sitting out on the open Internet containing what appears to be information on over 198,000 past customers.

According to a MacKeeper blog post, researcher Chris Vickery found a MongoDB database (a type of open-source database built on a document-based architecture) that apparently contains Kinotopic usernames, email addresses and hashed passwords. The blog recommends that Kinetopic's former users change the log-in credentials for their other active mobile apps if they are using the same password that they registered with Kinetopic.

Efforts to contact the developers of the defunct application have proven unsuccessful, the blog reports.