Auth bypass in Nextcloud Security-advisories
CVE-2025-66553
Nextcloud Tables allows you to create your own tables with individual columns. Prior to 0.8.7 and 0.9.4, authenticated users were able to view meta data of columns in other tables of the Tables app by modifying the numeric ID in a request…
Vulnerability class: IDOR (Insecure Direct Object Reference)
EPSS: 0.002 (15.1th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N.
Affected products
- Nextcloud Security-advisories — versions >= 0.9.0-beta.1, < 0.9.4, < 0.8.7
- Nextcloud Tables
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM, Patch, Vendor Advisory)
- security-advisories@github.com (x_refsource_MISC, Issue Tracking)
- security-advisories@github.com (Patch, x_refsource_MISC)
- security-advisories@github.com (x_refsource_MISC, Issue Tracking, Vendor Advisory)
Frequently asked questions
- What is CVE-2025-66553?
- CVE-2025-66553 is a medium-severity vulnerability in Nextcloud Security-advisories, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 4.3/10. Published 2025-12-05.
- How severe is CVE-2025-66553?
- Medium severity. CVSS v3 base score is 4.3 out of 10.