Mobile banking customers in the U.S. who use Citibank’s Citi Mobile app have been advised to update the app.

Citibank has updated its iPhone banking application to correct a security vulnerability that left user bank account information unprotected.

The update, issued on July 19 through Apple’s iTunes App Store, addresses a programming design flaw that stored personal banking data in a hidden but accessible file on the user’s iPhone.

Citibank notified its mobile banking customers in the U.S. about the problem on July 20, according to The Wall Street Journal.

Citibank did not immediately respond to a request for comment, but a company spokesperson told The Wall Street Journal that Citibank had no reason to believe that any personal information was compromised as a result of the flaw.

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It’s not clear how long Apple took to approve the update or when Citibank first learned of the flaw.

The app, Citi Mobile, was developed in part using code provided by mFoundry, a mobile banking technology company based in Larkspur, Calif.

Full Story Via InformationWeek

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