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CVE-2021-20748

23
FAUCET Score

CVE-2021-20748 is a high-severity vulnerability affecting Retty App for Android versions prior to 4.8.13 and iOS versions prior to 4.11.14. The flaw stems from the use of a hard-coded API key for an external service, which can be extracted through app analysis. With a CVSS score of 7.5, this vulnerability allows an unauthenticated attacker to remotely obtain the API key, potentially leading to unauthorized access to the external service. There is currently no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
< 4.8.13CPE matchmatch criteria
cpe:2.3:a:retty:retty:*:*:*:*:*:android:*:*
< 4.11.14CPE matchmatch criteria
cpe:2.3:a:retty:retty:*:*:*:*:*:iphone_os:*:*

CVSS Data

CVSS version used by this source: 3.1

7.5HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.04%
Probability of exploitation in next 30 days
EPSS Percentile
60.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0104 is in the 37th percentile among its peer group of 51,506 CVEs.

Social Chatter

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.

Media 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

Remediation records are not available for this CVE.

References

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