CVE-2021-20747

MEDIUM 4.3CVE-2021-20747 · Published 14/07/2021 · updated 17/06/2026

In short

CVE-2021-20747 is a MEDIUM (CVSS 4.3) vulnerability affecting retty (retty).
Chance of exploitation in the next 30 days (EPSS): 1.0%, higher than 63.1% of all vulnerabilities.
Fix: update to 4.11.14, 4.8.13 or later.

Package	Affected versions	Patched versions
retty retty	`< 4.11.14< 4.8.13`	`4.11.144.8.13`

Description

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.

References

drive.google.com/file/d/1PBYqIsK8QxEEhGJ4SEgpY7iZw3RTTDho/view · Third Party Advisory
jvn.jp/en/jp/JVN26891339/index.html · Third Party Advisory

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