Vulnerability · Published Dec 5, 2025 · Assigned by GitHub_M
CVE-2025-66551Nextcloud Tables is missing an ownership check which allows moving columns into tables of other users
Medium 6.3
In plain English
A medium-severity authorization bypass via user-controlled key in security-advisories from nextcloud. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 20% of all known vulnerabilities).
Severity (CVSS 3.1)6.3Medium
Exploit odds (30 days)0.3%top 80.4% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official 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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| nextcloud | security-advisories | >= 0.9.0-beta.1, < 0.9.3< 0.8.6 |
Weakness: CWE-639 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:H/A:L
References
- https://github.com/nextcloud/security-advisories/security/advisories/GHSA-w787-vwqp-8wr7 x_refsource_CONFIRM
- https://github.com/nextcloud/tables/pull/1810 x_refsource_MISC
- https://github.com/nextcloud/tables/commit/39f24a62fb41fd7a8bda65325f8bbafdc91c731c x_refsource_MISC
- https://hackerone.com/reports/3137895 x_refsource_MISC