VULNERABILITY INTELLIGENCE

CVE-2025-64011

CVSS score4.3 MEDIUM
EPSS probability0.32%
CISA KEVNot currently listed
Published2025-12-12
Last modified2026-10-14
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

Description

Nextcloud Server 30.0.0 is vulnerable to an Insecure Direct Object Reference (IDOR) in the /core/preview endpoint. Any authenticated user can access previews of arbitrary files belonging to other users by manipulating the fileId parameter. This allows unauthorized disclosure of sensitive data, such as text files or images, without prior sharing permissions.

Weakness classification

  • 134c704f-9b21-4f2e-91b3-4a467353bcc0: CWE-639

Primary references