What is CVE-2021-20748?

CVE-2021-20748 is a high-severity vulnerability in Retty, classified under Use of Hard-coded Credentials. CVSS score: 7.5/10. Published 2021-07-14.

How severe is CVE-2021-20748?

High severity. CVSS v3 base score is 7.5 out of 10.

Vulnerability in Retty

CVE-2021-20748

Retty App for Android versions prior to 4.8.13 and Retty App for iOS versions prior to 4.11.14 uses a hard-coded API key for an external service. By exploiting this vulnerability, API key for an external service may be obtained by analyzing data in the app.

Published 2021-07-14 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

EPSS exploit prediction

EPSS: 0.010 (62.6th percentile), scored 2026-10-01.

Low probability of exploitation in the next 30 days, but still tracked. 63rd percentile — 62.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.010 · newest: 0.010 · change: 0.000

Affected products

Retty
Retty Inc. App — versions Retty App for Android versions prior to 4.8.13 and Retty App for iOS versions prior to 4.11.14

Weakness classification (CWE)

CWE-798 — Use of Hard-coded Credentials

References

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

Frequently asked questions

What is CVE-2021-20748?: CVE-2021-20748 is a high-severity vulnerability in Retty, classified under Use of Hard-coded Credentials. CVSS score: 7.5/10. Published 2021-07-14.
How severe is CVE-2021-20748?: High severity. CVSS v3 base score is 7.5 out of 10.