CVE-2021-41166

Name: CVE-2021-41166
Creator: NVD / NIST
Published: 2022-01-26T23:15:08.217+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.3/10EPSS 0.95%

Last modified Jun 17, 2026

CVE-2021-41166 is a medium-severity vulnerability rated 5.3/10 on the CVSS scale. The Nextcloud Android app is the Android client for Nextcloud, a self-hosted productivity platform. An issue in versions prior to 3.17.1 may lead to sensitive information disclosure. EPSS estimates a 0.95% chance of exploitation in the next 30 days.

Description

The Nextcloud Android app is the Android client for Nextcloud, a self-hosted productivity platform. An issue in versions prior to 3.17.1 may lead to sensitive information disclosure. An unauthorized app that does not have the otherwise required `MANAGE_DOCUMENTS` permission may view image thumbnails for images it does not have permission to view. Version 3.17.1 contains a patch. There are no known workarounds.

Metrics

CVSS 3.1

5.3/10

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

EPSS Probability

0.95%

56.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Nextcloud	Nextcloud	< 3.17.1

References

https://github.com/nextcloud/android/commit/aa47197109970b8449c4e44601eba36e3481b086Patch, Third Party Advisory
https://github.com/nextcloud/android/commit/b6ecf515b38c2d82d32743f27236534f3e03ee0cPatch, Third Party Advisory
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-wrwg-jwpg-r3c4Patch, Third Party Advisory
https://hackerone.com/reports/1358597Permissions Required
https://github.com/nextcloud/android/commit/aa47197109970b8449c4e44601eba36e3481b086Patch, Third Party Advisory
https://github.com/nextcloud/android/commit/b6ecf515b38c2d82d32743f27236534f3e03ee0cPatch, Third Party Advisory
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-wrwg-jwpg-r3c4Patch, Third Party Advisory
https://hackerone.com/reports/1358597Permissions Required

Timeline

Published: Jan 26, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-41166?

How severe is CVE-2021-41166?

CVE-2021-41166 has a CVSS score of 5.3/10 (MEDIUM severity). The EPSS model estimates a 0.95% probability of exploitation in the next 30 days.

How do I fix CVE-2021-41166?

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-2021-41166?

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

Scan your code now

Source: NVD / NIST