Authentication bypass in nextcloud com.nextcloud.client
Priority LOW 28CWE-288Published · Updated
Key facts
- Attack vector
- Physical
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- High · High · None
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-288.
Summary
Bypass lock protection in the Nextcloud Android app prior to version 3.3.0 allowed access to files when being prompted for the lock protection and switching to the Nextcloud file provider.
Why it matters now
EPSS 0.00469 40th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| nextcloud | com.nextcloud.client | 3.3.0 | — | No fix listed | CNA |
- com.nextcloud.client Vendornextcloud Affected 3.3.0 Fixed in — No fix listed CNA
CPE configurations NVD · 4
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:nextcloud:nextcloud:*:*:*:*:*:android:*:* | up to 3.2.4 | Vulnerable | nextcloud |
| cpe:2.3:a:nextcloud:nextcloud:3.3.0:rc1:*:*:*:android:*:* | 3.3.0 rc1 | Vulnerable | nextcloud |
| cpe:2.3:a:nextcloud:nextcloud:3.3.0:rc2:*:*:*:android:*:* | 3.3.0 rc2 | Vulnerable | nextcloud |
| cpe:2.3:a:nextcloud:nextcloud:3.3.0:rc3:*:*:*:android:*:* | 3.3.0 rc3 | Vulnerable | nextcloud |
- cpe:2.3:a:nextcloud:nextcloud:*:*:*:*:*:android:*:* Versions up to 3.2.4 Vulnerable ·nextcloud
- cpe:2.3:a:nextcloud:nextcloud:3.3.0:rc1:*:*:*:android:*:* Versions 3.3.0 rc1 Vulnerable ·nextcloud
- cpe:2.3:a:nextcloud:nextcloud:3.3.0:rc2:*:*:*:android:*:* Versions 3.3.0 rc2 Vulnerable ·nextcloud
- cpe:2.3:a:nextcloud:nextcloud:3.3.0:rc3:*:*:*:android:*:* Versions 3.3.0 rc3 Vulnerable ·nextcloud
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2019-5453
- 2026-10-03 Alias added: GHSA-8q57-r99x-pmhc
References
Exploit 1
More Nextcloud vulnerabilities
- 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-2021-19669 SQL Injection in FileContentProvider (GHSL-2021-1007) CVSS 3.1HIGH 7.5
- 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
Sources
- CVE-2019-5453 · CVE Program
- CVE-2019-5453 · NVD
- FIRST EPSS
- GHSA-8q57-r99x-pmhc · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences