CVE-2021-43171

Name: CVE-2021-43171
Creator: NVD / NIST
Published: 2023-08-22T19:16:21.76+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.5/10EPSS 0.32%

Last modified Jun 17, 2026

CVE-2021-43171 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. Improper verification of applications' cryptographic signatures in the /e/OS app store client App Lounge before 0.19q allows attackers in control of the application server to install malicious applications on user's systems by altering the server's API response.. EPSS estimates a 0.32% chance of exploitation in the next 30 days.

Description

Improper verification of applications' cryptographic signatures in the /e/OS app store client App Lounge before 0.19q allows attackers in control of the application server to install malicious applications on user's systems by altering the server's API response.

Metrics

CVSS 3.1

6.5/10

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

EPSS Probability

0.32%

24.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-347

Affected Software

Vendor	Product	Versions
E.Foundation	App Lounge	< 0.19q

References

https://gitlab.e.foundation/e/os/releases/-/releases/v0.19-q#sparkles-we-embedded-other-improvementsRelease Notes
https://nervuri.net/e/appsThird Party Advisory
https://gitlab.e.foundation/e/os/releases/-/releases/v0.19-q#sparkles-we-embedded-other-improvementsRelease Notes
https://nervuri.net/e/appsThird Party Advisory

Timeline

Published: Aug 22, 2023
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-43171?

How severe is CVE-2021-43171?

CVE-2021-43171 has a CVSS score of 6.5/10 (MEDIUM severity). The EPSS model estimates a 0.32% probability of exploitation in the next 30 days.

How do I fix CVE-2021-43171?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-43171?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST