CVE-2021-20835 describes an improper authorization vulnerability in the Android app 'Mercari (Merpay) - Marketplace and Mobile Payments App' (Japan version) prior to 4.49.1. This flaw allows a remote attacker to redirect users to arbitrary websites and launch arbitrary in-app activities, potentially leading to the theft of Mercari account access tokens. Rated 7.5 HIGH on CVSS, the attack is network-based and low complexity, with a high impact on confidentiality. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage for this vulnerability.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
< 4.49.1CPE matchmatch criteria | cpe:2.3:a:mercari:mercari:*:*:*:*:*:android:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.
Remediation records are not available for this CVE.