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TI-2020-06557 Aliases CVE-2020-8139GHSA-3j4p-7g9x-w28j

Improper access control in Nextcloud Server

Priority LOW 32CWE-284Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Security bypass
Confidentiality · integrity · availability
High · None · None
Fix status
No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-284.

Summary

A missing access control check in Nextcloud Server < 18.0.1, < 17.0.4, and < 16.0.9 causes hide-download shares to be downloadable when appending /download to the URL.

Why it matters now

EPSS 0.01536 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

VendorProductAffected versionsFixed inStatusSource
—Nextcloud ServerFixed in 18.0.1, 17.0.4, and 16.0.9—No fix listedCNA
  • Nextcloud Server Vendor— Affected Fixed in 18.0.1, 17.0.4, and 16.0.9 Fixed in — No fix listed CNA

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:*:*:*:*16.0.0 to before 16.0.9; 17.0.0 to before 17.0.4; 18.0.0 to before 18.0.1Vulnerablenextcloud
cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:*32VulnerableFedoraproject
  • cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:*:*:*:* Versions 16.0.0 to before 16.0.9; 17.0.0 to before 17.0.4; 18.0.0 to before 18.0.1 Vulnerable ·nextcloud
  • cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:* Versions 32 Vulnerable ·Fedoraproject

Remediation

No fixed version listed by the sources yet.

Vendor assessments

Red Hat

Red Hat's page for this CVE →

Not affected: 1 product
  • Red Hat

Timeline

  1. 2026-10-02 Threatist record created from CVE-2020-8139
  2. 2026-10-03 Alias added: GHSA-3j4p-7g9x-w28j

References

Advisory 2

Other 1

Sources

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