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CVE-2021-43863

7.5 · HIGH

The Nextcloud Android app is the Android client for Nextcloud, a self-hosted productivity platform.

Published Jan 25, 2022CWE-89EPSS 1.87%

Overview

CVE-2021-43863 is a high-severity vulnerability. It was published on January 25, 2022 and has a CVSS 3.1 base score of 7.5 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical 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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgithub.com/nextcloud/android/commit/627caba60e69e223b0fc89c4cb18eaa76a95db95GitHubgithub.com/nextcloud/android/security/advisories/GHSA-vjp2-f63v-w479Refhackerone.com/reports/1358597GitHubgithub.com/nextcloud/android/commit/627caba60e69e223b0fc89c4cb18eaa76a95db95GitHubgithub.com/nextcloud/android/security/advisories/GHSA-vjp2-f63v-w479Refhackerone.com/reports/1358597

How CyberStrike helps

Frequently asked questions

What is CVE-2021-43863?

CVE-2021-43863 is a high-severity vulnerability. It was published on January 25, 2022 and has a CVSS 3.1 base score of 7.5 (HIGH).

How severe is CVE-2021-43863?

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2021-43863?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2021-43863?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2021-43863 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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