CVE-2025-66513

Unknown Unknown - Not Provided

BaseFortify

Publication date: 2025-12-05

Last updated on: 2025-12-09

Assigner: GitHub, Inc.

Description

Nextcloud Tables allows you to create your own tables with individual columns. Prior to 0.8.9, 0.9.6, and 1.0.1, the information which table (numeric ID) is shared with which groups or users and the respective permissions was not limited to privileged users. This vulnerability is fixed in 0.8.9, 0.9.6, and 1.0.1.

CVSS Scores

EPSS Scores

Probability:
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Meta Information

Published

2025-12-05

Last Modified

2025-12-09

Generated

2026-07-06

AI Q&A

2025-12-05

EPSS Evaluated

2026-07-05

NVD

CVE-2025-66513

EUVD

EUVD-2025-201441

Affected Vendors & Products

Vendor	Product	Version / Range
nextcloud	tables	From 0.6.0 (inc) to 0.8.9 (exc)
nextcloud	tables	From 0.9.0 (inc) to 0.9.6 (exc)
nextcloud	tables	From 1.0.0 (inc) to 1.0.1 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-639	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.

Attack-Flow Graph

Executive Summary

This vulnerability in Nextcloud Tables allowed unauthorized users to access information about which tables (identified by numeric IDs) were shared with which groups or users, along with the permissions granted. This information was accessible without proper privilege restrictions prior to versions 0.8.9, 0.9.6, and 1.0.1, potentially exposing sharing details to unauthorized parties.

Impact Analysis

The vulnerability could lead to unauthorized disclosure of sharing information, revealing which tables are shared with which users or groups and their permissions. This could allow attackers or unauthorized users to gain insights into data sharing configurations, potentially facilitating further attacks or privacy breaches.

Mitigation Strategies

Update Nextcloud Tables to version 0.8.9, 0.9.6, or 1.0.1 or later, as these versions contain the fix for this vulnerability.

Compliance Impact

This vulnerability allows unauthorized users to access information about which tables are shared with which groups or users and their permissions, leading to a low confidentiality loss. Such unauthorized disclosure of sharing information could potentially impact compliance with data protection regulations like GDPR or HIPAA, which require strict control over access to personal or sensitive data. By exposing sharing details without proper authorization, the vulnerability may increase the risk of non-compliance with these standards. The fix enforces stricter permission checks and hides resource existence from unauthorized users, thereby improving compliance posture. [3, 1]

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