High advisory for VitaFit Android application (com

Advisory overview

VitaFit Android application (com.vt.vitafit) before 2.8.1.0 contains an insecure custom URI scheme vulnerability that allows a malicious application to intercept Fitbit login tokens by registering the same callback scheme (vitafit://vtio.cn). Attackers can capture the 30-day Fitbit authorization token with weight scope delivered in the callback URL to read, create, and delete the victim's weight and body-fat records via the Fitbit Body API.

Related references

• https://github.com/je-lv/vitafit-security-research
• https://play.google.com/store/apps/details?id=com.vt.vitafit
• https://www.vulncheck.com/advisories/vitafit-android-custom-uri-scheme-token-hijacking