During security testing a vulnerability was exposed on the Authy app, a two-factor authentication tool. Less than 0.2% of Authy users were affected. Also read: Bitcoin is Destined to Replace Insecure Payment Protocols An outside security research team discovered the vulnerability which affects users who changed the phone number on Authy accounts since February 2014. The users affected were no longer able to access their original phone and so thus had to prove phone ownership.
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Yesterday, a security notice was launched in Authy’s blog. An independent security researcher from Sakurity found a bug in the popular 2FA app Authy. Egor Homakov was responsible for finding a Format Injection vulnerability that affected the Authy service through a commonly used open source library.