A missing file type check in Nextcloud Contacts 3.2.0 allowed a malicious user to upload any file as avatars.
Priority LOW 21CWE-840Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Code execution
- 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-434.
Summary
A missing file type check in Nextcloud Contacts 3.2.0 allowed a malicious user to upload any file as avatars.
Why it matters now
EPSS 0.0079 56th 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 Contact | 3.3.0 | — | No fix listed | CNA |
- Nextcloud Contact Vendor— Affected 3.3.0 Fixed in — No fix listed CNA
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2020-8181
- 2026-10-03 Alias added: GHSA-wgmx-fv9q-wpfx
References
More nextcloud Contacts vulnerabilities
- TI-2021-16606 XSS in Contacts CVSS 3.1MEDIUM 6.4
- TI-2020-06698 Cross-site scripting in Nextcloud Contacts CVSS 3.1MEDIUM 5.4
- TI-2020-06697 Cross-site scripting in Nextcloud Contacts CVSS 3.1MEDIUM 5.4
- TI-2025-40965 Nextcloud Contacts vulnerable to Stored XSS in contacts app via organisation and title field CVSS 3.1MEDIUM 5.4
- TI-2018-02760 Cross-site scripting in Nextcloud Contacts application CVSS 3.1MEDIUM 4.8
- TI-2023-16359 Nextcloud Contacts photos only sanitized if mime type is all lower case CVSS 3.1MEDIUM 4.3
Sources
- CVE-2020-8181 · CVE Program
- CVE-2020-8181 · NVD
- FIRST EPSS
- GHSA-wgmx-fv9q-wpfx · GitHub Advisory Database · CC BY 4.0
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