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Vulnerability Details :

CVE-2025-64011

Summary
Assigner-mitre
Assigner Org ID-8254265b-2729-46b6-b9e3-3dfca2d5bfca
Published At-12 Dec, 2025 | 00:00
Updated At-12 Dec, 2025 | 19:12
Rejected At-
Credits

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.

Vendors
-
Not available
Products
-
Metrics (CVSS)
VersionBase scoreBase severityVector
Weaknesses
Attack Patterns
Solution/Workaround
References
HyperlinkResource Type
EPSS History
Score
Latest Score
-
N/A
No data available for selected date range
Percentile
Latest Percentile
-
N/A
No data available for selected date range
Stakeholder-Specific Vulnerability Categorization (SSVC)
▼Common Vulnerabilities and Exposures (CVE)
cve.org
Assigner:mitre
Assigner Org ID:8254265b-2729-46b6-b9e3-3dfca2d5bfca
Published At:12 Dec, 2025 | 00:00
Updated At:12 Dec, 2025 | 19:12
Rejected At:
▼CVE Numbering Authority (CNA)

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 Products
Vendor
n/a
Product
n/a
Versions
Affected
  • n/a
Problem Types
TypeCWE IDDescription
textN/An/a
Type: text
CWE ID: N/A
Description: n/a
Metrics
VersionBase scoreBase severityVector
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
https://drive.google.com/file/d/1eD3PN-u1caZYgGH96XHmJ7h_OBXEAHW4/view?usp=sharing
N/A
https://nextcloud.com
N/A
https://gist.github.com/tarekramm/586dfe2d113fedfee6d71182570fc090
N/A
Hyperlink: https://drive.google.com/file/d/1eD3PN-u1caZYgGH96XHmJ7h_OBXEAHW4/view?usp=sharing
Resource: N/A
Hyperlink: https://nextcloud.com
Resource: N/A
Hyperlink: https://gist.github.com/tarekramm/586dfe2d113fedfee6d71182570fc090
Resource: N/A
▼Authorized Data Publishers (ADP)
CISA ADP Vulnrichment
Affected Products
Problem Types
TypeCWE IDDescription
CWECWE-639CWE-639 Authorization Bypass Through User-Controlled Key
Type: CWE
CWE ID: CWE-639
Description: CWE-639 Authorization Bypass Through User-Controlled Key
Metrics
VersionBase scoreBase severityVector
3.14.3MEDIUM
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Version: 3.1
Base score: 4.3
Base severity: MEDIUM
Vector:
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
Information is not available yet
▼National Vulnerability Database (NVD)
nvd.nist.gov
Source:cve@mitre.org
Published At:12 Dec, 2025 | 17:15
Updated At:19 Dec, 2025 | 15:47

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.

CISA Catalog
Date AddedDue DateVulnerability NameRequired Action
N/A
Date Added: N/A
Due Date: N/A
Vulnerability Name: N/A
Required Action: N/A
Metrics
TypeVersionBase scoreBase severityVector
Secondary3.14.3MEDIUM
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Type: Secondary
Version: 3.1
Base score: 4.3
Base severity: MEDIUM
Vector:
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
CPE Matches
Nextcloud GmbH
nextcloud
>>nextcloud_server>>30.0.0
cpe:2.3:a:nextcloud:nextcloud_server:30.0.0:-:*:*:*:*:*:*
Weaknesses
CWE IDTypeSource
CWE-639Secondary134c704f-9b21-4f2e-91b3-4a467353bcc0
CWE ID: CWE-639
Type: Secondary
Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0
Evaluator Description
Evaluator Impact

Evaluator Solution

Vendor Statements
References
HyperlinkSourceResource
https://drive.google.com/file/d/1eD3PN-u1caZYgGH96XHmJ7h_OBXEAHW4/view?usp=sharingcve@mitre.org
Exploit
https://gist.github.com/tarekramm/586dfe2d113fedfee6d71182570fc090cve@mitre.org
Exploit
Third Party Advisory
https://nextcloud.comcve@mitre.org
Product
Hyperlink: https://drive.google.com/file/d/1eD3PN-u1caZYgGH96XHmJ7h_OBXEAHW4/view?usp=sharing
Source: cve@mitre.org
Resource:
Exploit
Hyperlink: https://gist.github.com/tarekramm/586dfe2d113fedfee6d71182570fc090
Source: cve@mitre.org
Resource:
Exploit
Third Party Advisory
Hyperlink: https://nextcloud.com
Source: cve@mitre.org
Resource:
Product

Change History

0
Information is not available yet

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