CVE-2025-64011

Published: Dec 12, 2025Updated: Dec 19, 2025 Sources: CVE List NVD BDUCWE-639

4.3MEDIUM

NVD MITRE

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.

No summary for this CVE yet.

CVSS Vector Breakdown

Exploitability

AV:NAttack Vector

Network

AC:LAttack Complexity

Low

PR:LPrivileges Required

Low

UI:NUser Interaction

None

Scope

S:UScope

Unchanged

Impact

C:LConfidentiality

Low

I:NIntegrity

None

A:NAvailability

None

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Weaknesses

CWE-639

Affected Products

nextcloud

oss-project·DEaka nextcloud server

nextcloud serverSaaSSaaS Service

Cloud & SaaS / saas-application

ООО «Ред Софт»

commercial·RUaka red soft

РЕД ОСOn-premOS

Operating Systems / linux-distro

Nextcloud GmbH

commercial·DEaka nextcloud enterprise server, nextcloud server, nextcloud calendar

Nextcloud ServerSaaSSaaS Service

Cloud & SaaS / saas-application

and 1 more affected products View all →

Exploitability

2 exploit sources identified

Exploit details including PoC links, Metasploit modules, and scanner templates are available after registration.

View exploit details

Official Patch Available

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Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

1 technique

Initial Access

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References

https://drive.google.com/file/d/1eD3PN-u1caZYgGH96XHmJ7h_OBXEAHW4/view?usp=sharing

drive.google.com

https://nextcloud.com

nextcloud.com

https://gist.github.com/tarekramm/586dfe2d113fedfee6d71182570fc090

gist.github.com

and 4 more references View all →

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