Nextcloud Tables Vulnerability Allows Unauthorized Table Manipulation
CVE-2025-66551

6.3MEDIUM

Key Information:

Vendor

Nextcloud
Status
Security-advisories
Vendor
CVE Published:
5 December 2025

What is CVE-2025-66551?

The Nextcloud Tables feature allows users to create and manage custom tables. However, in versions prior to 0.8.6 and 0.9.3, a vulnerability was identified that enables a malicious user to create their own table and subsequently transfer columns to another user's table, thereby compromising data integrity and security. This issue has been addressed in the updated releases.

Affected Version(s)

security-advisories >= 0.9.0-beta.1, < 0.9.3 < 0.9.0-beta.1, 0.9.3

security-advisories < 0.8.6 < 0.8.6

References

https://github.com/nextcloud/security-advisories/security...
x_refsource_CONFIRM
https://github.com/nextcloud/tables/pull/1810
x_refsource_MISC
https://github.com/nextcloud/tables/commit/39f24a62fb41fd...
x_refsource_MISC

CVSS V3.1

Score:
6.3
Severity:
MEDIUM
Confidentiality:
None
Integrity:
High
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
Required
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

JSON
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CVE-2025-66551 : Nextcloud Tables Vulnerability Allows Unauthorized Table Manipulation