CVE-2021-43863

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.

How to fix CVE-2021-43863

To remediate CVE-2021-43863, upgrade the affected package to a fixed version below.

• —upgrade to 3.18.1 or later

Is CVE-2021-43863 being exploited?

Low — EPSS is 1.9%, meaning exploitation activity has not been observed at scale.

Affected packages (1)

• from 0, < 3.18.1

CVSS scores

References (4)

• WEBgithub.com/nextcloud/android/commit/627caba60e69e223b0fc89c4cb18eaa76a95db95
• WEBgithub.com/nextcloud/android/security/advisories/GHSA-vjp2-f63v-w479
• WEBhackerone.com/reports/1358597
• WEBnvd.nist.gov/vuln/detail/CVE-2021-43863