Medium severity · published Dec 5, 2025
CVE-2025-66551
Nextcloud Tables is missing an ownership check which allows moving columns into tables of other users
4.3
CVSS
0.3%
EPSS
No
On KEV
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 vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
None
Integrity
Low
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 17% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
SE
security-advisories · nextcloud
>= 0.9.0-beta.1, < 0.9.3; < 0.8.6 · source: vendor
TA
Tables · Nextcloud
0.4.0 before 0.8.6; 0.9.0 before 0.9.3 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-66551
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-66551
Vendor Advisory
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-w787-vwqp-8wr7
Patch
https://github.com/nextcloud/tables/commit/39f24a62fb41fd7a8bda65325f8bbafdc91c731c
Issue Tracking
https://github.com/nextcloud/tables/pull/1810
Issue Tracking
https://hackerone.com/reports/3137895
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