CVE-2025-66551

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 v3.1 Score

6.3

MEDIUM

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

Weakness Type (CWE)

CWE-639 CWE-639

Affected Products

Vendor	Product	Versions
nextcloud	tables	0.4.0 — 0.8.6
nextcloud	tables	0.9.0 — 0.9.3

References

Advisories & Patches

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

Frequently Asked Questions

What is CVE-2025-66551? +

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. It has a CVSS v3.1 base score of 6.3 (MEDIUM).

How severe is CVE-2025-66551? +

CVE-2025-66551 has a CVSS v3.1 score of 6.3 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

What products are affected by CVE-2025-66551? +

CVE-2025-66551 affects products from nextcloud, specifically: tables. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-66551? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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