CVE-2021-43863

HIGH

Nextcloud Android <3.18.1 - Privilege Escalation

Title source: llm
STIX 2.1

Description

The Nextcloud Android app is the Android client for Nextcloud, a self-hosted productivity platform. The Nextcloud Android app uses content providers to manage its data. Prior to version 3.18.1, the providers `FileContentProvider` and `DiskLruImageCacheFileProvider` have security issues (an SQL injection, and an insufficient permission control, respectively) that allow malicious apps in the same device to access Nextcloud's data bypassing the permission control system. Users should upgrade to version 3.18.1 to receive a patch. There are no known workarounds aside from upgrading.

References (3)

Core 3
Core References
Permissions Required x_refsource_misc
https://hackerone.com/reports/1358597

Scores

CVSS v3 7.5
EPSS 0.0025
EPSS Percentile 47.9%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

CISA SSVC

Vulnrichment
Exploitation none
Automatable yes
Technical Impact partial

Details

CWE
CWE-89
Status published
Products (1)
nextcloud/nextcloud < 3.18.1
Published Jan 25, 2022
Tracked Since Feb 18, 2026