What is CVE-2020-5604?

CVE-2020-5604 is a high-severity vulnerability in Mercari. CVSS score: 8.1/10. Published 2020-07-09.

How severe is CVE-2020-5604?

High severity. CVSS v3 base score is 8.1 out of 10.

Vulnerability in Mercari

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 Man-In-The-Middle attack by using Java Reflection API of JavaScript code on WebView.

Published 2020-07-09 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.020 (79.9th percentile), scored 2026-10-01.

Low probability of exploitation in the next 30 days, but still tracked. 80th percentile — 79.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.020 · newest: 0.020 · change: 0.000

Affected products

Mercari
Mercari, Inc. Android App 'Mercari' (Japan Version) — versions prior to version 3.52.0

References

jvn.jp/en/jp/JVN93167107/index.html (Third Party Advisory)

Frequently asked questions

What is CVE-2020-5604?: CVE-2020-5604 is a high-severity vulnerability in Mercari. CVSS score: 8.1/10. Published 2020-07-09.
How severe is CVE-2020-5604?: High severity. CVSS v3 base score is 8.1 out of 10.