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CVE-2021-20835

HIGH
7.5
CVSS Score
Published: November 24, 2021 at 08:25 AM UTC
Updated: June 17, 2026 at 03:34 AM UTC
1 product affected across 1 vendorMercari

Using Android App 'Mercari (Merpay) - Marketplace and Mobile Payments App' (Japan version) by Mercari, Inc.?

Get instant alerts when new vulnerabilities affect Android App 'Mercari (Merpay) - Marketplace and Mobile Payments App' (Japan version) - before attackers find them.

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Severity
HIGH7.5
Exploit prediction
EPSS 2%

Description

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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Mercari· Mercari
95%
v < 4.49.1
Affected range stops below 4.49.1, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (1)

x_refsource_MISCThird Party Advisory
Source: [email protected]
https://jvn.jp/en/jp/JVN49465877/index.html

CVSS

7.5HIGH[email protected]
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
NONE
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-862

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