CVE-2021-20747

4.3 mediumEPSS 1.0%

Medium (4.3) in retty retty. EPSS 1.0% chance of exploitation in the next 30 days.

Improper authorization in handler for custom URL scheme vulnerability in Retty App for Android versions prior to 4.8.13 and Retty App for iOS versions prior to 4.11.14 allows a remote attacker to lead a user to access an arbitrary website via the vulnerable App.

Severity

CVSS 3.1

4.3 medium

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N

EPSS: 1.0% chance of exploitation in the next 30 days; higher than 62% of CVEs (scores of 2026-10-31)
CWE: CWE-862
Published: 2021-07-14
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

retty:retty

References

https://drive.google.com/file/d/1PBYqIsK8QxEEhGJ4SEgpY7iZw3RTTDho/view
https://jvn.jp/en/jp/JVN26891339/index.html
https://drive.google.com/file/d/1PBYqIsK8QxEEhGJ4SEgpY7iZw3RTTDho/view
https://jvn.jp/en/jp/JVN26891339/index.html

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