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CVE-2025-64011

nvd nist
Published: Dec 12, 2025Modified: Jun 17, 2026

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4.3
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Exploitability: 2.8 / Impact: 1.4
Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0 (Secondary)

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.

Affected (1)

Nextcloud
1 product
Nextcloud Server
Configuration A
1 vulnerable
Vulnerable SoftwareAffected Versions
Nextcloud Server
Version 30.0.0

Related CWEs

CWE-639
Authorization Bypass Through User-Controlled Key
The system's authorization functionality does not prevent one user from gaining access to another user's data or record by modifying the key value identifying the data.

References (3)

Source: cve@mitre.org
Exploit
Source: cve@mitre.org
ExploitThird Party Advisory
Source: cve@mitre.org
Product

Timeline

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