Vulnerability CVE-2021-41166
Published: 2022-01-26   Modified: 2022-01-27

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.

Type:

CWE-276

 (Incorrect Default Permissions)

CVSS2 => (AV:N/AC:L/Au:N/C:P/I:N/A:N)

CVSS Base Score
Impact Subscore
Exploitability Subscore
5/10
2.9/10
10/10
Exploit range
Attack complexity
Authentication
Remote
Low
No required
Confidentiality impact
Integrity impact
Availability impact
Partial
None
None
Affected software
Nextcloud -> Nextcloud 

 References:
https://github.com/nextcloud/android/commit/aa47197109970b8449c4e44601eba36e3481b086
https://hackerone.com/reports/1358597
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-wrwg-jwpg-r3c4
https://github.com/nextcloud/android/commit/b6ecf515b38c2d82d32743f27236534f3e03ee0c
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