What’s Vulnerable › Vulnerabilities

CVE-2021-43863: SQL Injection in FileContentProvider (GHSL-2021-1007)

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.9% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2022-01-25 · updated 2026-06-17
• Weakness: CWE-89

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.

Affected products

• com.nextcloud.client: before 3.18.1 — fixed in 3.18.1

How to fix

Upgrade to a fixed version: com.nextcloud.client 3.18.1. Check the vendor advisory for mitigations.

References

• https://github.com/nextcloud/android/commit/627caba60e69e223b0fc89c4cb18eaa76a95db95
• https://github.com/nextcloud/android/security/advisories/GHSA-vjp2-f63v-w479
• https://hackerone.com/reports/1358597
• https://github.com/nextcloud/android/commit/627caba60e69e223b0fc89c4cb18eaa76a95db95
• https://github.com/nextcloud/android/security/advisories/GHSA-vjp2-f63v-w479
• https://hackerone.com/reports/1358597

Get alerted when CVE-2021-43863 or the next vulnerability affects your stack