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Vulnerability record · CVE-2025-66551 · published 5 December 2025

CVE-2025-66551: Nextcloud tables insecure direct object reference vulnerability

Nextcloud · Tables

Nextcloud Tables allows you to create your own tables with individual columns. Prior to 0.8.6 and 0.9.3, a malicious user was able to create their own table and then move a column to a victims table. This vulnerability is fixed in 0.8.6 and 0.9.3.

4.3 CVSS 3.1 Medium EPSS 0.25% · top 84.9% CWE-639 · Insecure direct object reference
4.3CVSS 3.1 base score
0.25%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
4References
25 Sep 2026Last modified by NVD

Description

Nextcloud Tables allows you to create your own tables with individual columns. Prior to 0.8.6 and 0.9.3, a malicious user was able to create their own table and then move a column to a victims table. This vulnerability is fixed in 0.8.6 and 0.9.3.

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-w787-vwqp-8wr7 Vendor Advisory
https://github.com/nextcloud/tables/commit/39f24a62fb41fd7a8bda65325f8bbafdc91c731c Patch
https://github.com/nextcloud/tables/pull/1810 Issue TrackingPatch
https://hackerone.com/reports/3137895 Issue TrackingVendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2025-66551), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.