What’s Vulnerable › Vulnerabilities

CVE-2017-0885

• Severity: medium (CVSS 4.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.9% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2017-04-05 · updated 2026-06-17
• Weakness: CWE-209

Description

Nextcloud Server before 9.0.55 and 10.0.2 suffers from a error message disclosing existence of file in write-only share. Due to an error in the application logic an adversary with access to a write-only share may enumerate the names of existing files and subfolders by comparing the exception messages.

Affected products

• Nextcloud Server: before 9.0.55; from 10.0.0 before 10.0.2 — fixed in 10.0.2, 9.0.55

How to fix

Upgrade to a fixed version: Nextcloud Server 10.0.2, 9.0.55. Check the vendor advisory for mitigations.

References

• https://hackerone.com/reports/174524
• https://nextcloud.com/security/advisory/?id=nc-sa-2017-003
• https://hackerone.com/reports/174524
• https://nextcloud.com/security/advisory/?id=nc-sa-2017-003

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