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TI-2021-19669 Aliases CVE-2021-43863

SQL Injection in FileContentProvider (GHSL-2021-1007)

Priority MEDIUM 43CWE-89Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
SQL injection
Confidentiality · integrity · availability
High · None · None
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-89.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.01874 79th percentileScored 2026-11-07
Fix Fixed android (nextcloud): 3.18.1

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
nextcloudandroidbefore 3.18.13.18.1Patch availableCNA
  • android Vendornextcloud Affected before 3.18.1 Fixed in 3.18.1 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:nextcloud:nextcloud:*:*:*:*:*:android:*:*before 3.18.1Vulnerablenextcloud
  • cpe:2.3:a:nextcloud:nextcloud:*:*:*:*:*:android:*:* Versions before 3.18.1 Vulnerable ·nextcloud

Remediation

  • Fix · CNA android (nextcloud) Fixed in 3.18.1

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-43863

References

Patch 1

Advisory 1

Other 1

  • TI-2022-11704 Sensitive files/data exist after deletion of user account in Nextcloud Android CVSS 3.1LOW 3.3
  • TI-2022-08695 Improper Authentication in Nextcloud Android Files CVSS 3.1LOW 2.4
  • TI-2019-03862 SQL injection in com.nextcloud.client CVSS 3.1CRITICAL 9.8
  • TI-2023-13460 Nextcloud: Lack of authenticity of metadata keys allows a malicious server to gain access to E2EE folders CVSS 3.1MEDIUM 6.9
  • TI-2021-12395 End-to-end encryption device setup did not verify public key CVSS 3.1HIGH 7.5
  • TI-2021-05773 Information disclosure in Nextcloud iOS app CVSS 3.1MEDIUM 6.5
See all 27 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences