CVE-2025-66551

4.3 mediumEPSS 0.3%

Medium (4.3) in nextcloud tables. EPSS 0.3% chance of exploitation in the next 30 days.

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.

Severity

CVSS 3.1

4.3 medium

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

EPSS: 0.3% chance of exploitation in the next 30 days; higher than 16% of CVEs (scores of 2026-10-31)
CWE: CWE-639
Published: 2025-12-05
Modified: 2026-09-25
Record from: the NVD, synced 2026-10-19

Affected

nextcloud:tables

References

https://github.com/nextcloud/security-advisories/security/advisories/GHSA-w787-vwqp-8wr7
https://github.com/nextcloud/tables/commit/39f24a62fb41fd7a8bda65325f8bbafdc91c731c
https://github.com/nextcloud/tables/pull/1810
https://hackerone.com/reports/3137895

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