Nextcloud Tables <1.0.1 Unauthorized Share Permissions Leak
CVE-2025-66513 Published on December 5, 2025
Nextcloud Tables app share information not limited to relevant users
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.
Vulnerability Analysis
CVE-2025-66513 can be exploited with network access, requires user interaction. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have a small impact on confidentiality, a small impact on integrity and availability.
Weakness Type
What is an Insecure Direct Object Reference / IDOR Vulnerability?
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.
CVE-2025-66513 has been classified to as an Insecure Direct Object Reference / IDOR vulnerability or weakness.
Affected Versions
nextcloud security-advisories:- Version >= 1.0.0-beta.1, < 1.0.1 is affected.
- Version >= 0.9.0-beta.1, < 0.9.6 is affected.
- Version < 0.8.9 is affected.
Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.