CVE-2021-20835: Mercari

High severity, CVSS 7.5. EPSS: 1.6% chance of exploitation in the next 30 days.

Improper authorization in handler for custom URL scheme vulnerability in Android App 'Mercari (Merpay) - Marketplace and Mobile Payments App' (Japan version) versions prior to 4.49.1 allows a remote attacker to lead a user to access an arbitrary website and the website launches an arbitrary Activity of the app via the vulnerable App, which may result in Mercari account's access token being obtained.

Affected products

• Mercari Mercari: before 4.49.1 (fixed in 4.49.1)

Published 2021-11-24. Last modified 2026-06-17.