What’s Vulnerable › Vulnerabilities

CVE-2018-3762

• 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: 2018-07-05 · updated 2026-06-17
• Weakness: CWE-284

Description

Nextcloud Server before 12.0.8 and 13.0.3 suffers from improper checks of dropped permissions for incoming shares allowing a user to still request previews for files it should not have access to.

Affected products

• Nextcloud Server: before 12.0.8; from 13.0.0 before 13.0.3 — fixed in 12.0.8, 13.0.3

How to fix

Upgrade to a fixed version: Nextcloud Server 12.0.8, 13.0.3. Check the vendor advisory for mitigations.

References

• https://hackerone.com/reports/358339
• https://nextcloud.com/security/advisory/?id=nc-sa-2018-002
• https://hackerone.com/reports/358339
• https://nextcloud.com/security/advisory/?id=nc-sa-2018-002

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