CVE-2021-20747 json
Improper authorization in handler for custom URL scheme vulnerability in Retty App for Android versions prior to 4.8.13 and Retty App for i…
published 2021-07-14 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-8161
- cvss
- 4.3
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.0%
- EPSS 1.0% chance of exploitation in 30 days, percentile 63%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- retty retty 4.8.13, 4.11.14
Exploit prediction
1.00% chance of exploitation in the next 30 days, higher than 63% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 4.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N |
| NVD | 2.0 | 4.3 | AV:N/AC:M/Au:N/C:P/I:N/A:N |
Affected products
- Retty Inc. Retty App
Classification
- Weakness
-
- CWE-862 Missing Authorization
References
-
drive.google.com
/file/d/1PBYqIsK8QxEEhGJ4SEgpY7iZw3RTTDho/view
third-party-advisory
-
jvn.jp
/en/jp/JVN26891339/index.html
third-party-advisory
Sources
- CVE List CVE-2021-20747
- NVD CVE-2021-20747
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