Improper input validation in Nextcloud Server
Priority LOW 23CWE-451Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- Spoofing
- Confidentiality · integrity · availability
- None · Low · None
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-451.
Summary
Nextcloud Server before 9.0.55 and 10.0.2 suffers from a Content-Spoofing vulnerability in the "files" app. The top navigation bar displayed in the files list contained partially user-controllable input leading to a potential misrepresentation of information.
Why it matters now
EPSS 0.01537 75th percentileScored 2026-11-07
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 | Nextcloud Server | All versions before 9.0.55 and 10.0.2 | — | No fix listed | CNA |
- Nextcloud Server Vendornextcloud Affected All versions before 9.0.55 and 10.0.2 Fixed in — No fix listed CNA
Remediation
No fixed version listed by the sources yet.
Vendor assessments
Timeline
- 2026-10-02 Threatist record created from CVE-2017-0888
- 2026-10-03 Alias added: GHSA-vm7h-q75f-9ph4
References
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-2017-0888 · CVE Program
- CVE-2017-0888 · NVD
- FIRST EPSS
- GHSA-vm7h-q75f-9ph4 · GitHub Advisory Database · CC BY 4.0
- CVE-2017-0888 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences