CVE-2021-20835 : What You Need to Know
Learn about CVE-2021-20835 affecting Android App 'Mercari (Merpay)'. Understand the impact, technical details, and mitigation steps to secure your Mercari account from unauthorized access.
Android App 'Mercari (Merpay) - Marketplace and Mobile Payments App' (Japan version) prior to version 4.49.1 is affected by an improper authorization vulnerability. An attacker can exploit this issue to direct a user to access a malicious website and perform unauthorized activities using the app, potentially leading to the theft of Mercari account access tokens.
Understanding CVE-2021-20835
This section provides an overview of the vulnerability and its impact.
What is CVE-2021-20835?
The vulnerability in the Android App 'Mercari (Merpay)' allows a remote attacker to manipulate the app to induce users to visit malicious websites, triggering unauthorized app activities and potential account compromise.
The Impact of CVE-2021-20835
The vulnerability could result in the unauthorized access to Mercari account tokens, potentially leading to account compromise and exploitation by malicious entities.
Technical Details of CVE-2021-20835
Explore the technical aspects of the vulnerability in more detail.
Vulnerability Description
The improper authorization vulnerability in the Android App 'Mercari (Merpay)' enables attackers to abuse the custom URL scheme handler, manipulating user interactions to carry out unauthorized actions.
Affected Systems and Versions
Android App 'Mercari (Merpay)' Japan version prior to 4.49.1 is known to be impacted by this vulnerability.
Exploitation Mechanism
Remote attackers can lure users into accessing harmful websites through the app, leveraging the custom URL scheme handler to execute unauthorized app activities.
Mitigation and Prevention
Discover the steps to mitigate the risks associated with CVE-2021-20835.
Immediate Steps to Take
Users should update their 'Mercari (Merpay)' app to version 4.49.1 or above to remediate the vulnerability and enhance security.
Long-Term Security Practices
Practicing caution while using mobile apps and staying informed about security updates can reduce the risks of falling victim to similar vulnerabilities.
Patching and Updates
Regularly check for app updates and security advisories from Mercari, Inc. to stay protected against emerging threats.