CVE-2025-66557

Description

Nextcloud Deck is a kanban style organization tool aimed at personal planning and project organization for teams integrated with Nextcloud. Prior to 1.14.6 and 1.15.2, a bug in the permission logic allowed users with "Can share" permission to modify the permissions of other recipients. This vulnerability is fixed in 1.14.6 and 1.15.2.

CVSS v3.1 Score

5.4

MEDIUM

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

Weakness Type (CWE)

CWE-284 CWE-284

Affected Products

Vendor	Product	Versions
nextcloud	deck	1.14.0 — 1.14.6
nextcloud	deck	1.15.0 — 1.15.2

References

Advisories & Patches

https://github.com/nextcloud/deck/commit/f1da8b30a455f02373d44154da04494c949a95ae https://github.com/nextcloud/deck/pull/7131 https://github.com/nextcloud/security-advisories/security/advisories/GHSA-wwr8-hx9g-rjvv https://hackerone.com/reports/3247499

Frequently Asked Questions

What is CVE-2025-66557? +

Nextcloud Deck is a kanban style organization tool aimed at personal planning and project organization for teams integrated with Nextcloud. Prior to 1.14.6 and 1.15.2, a bug in the permission logic allowed users with "Can share" permission to modify the permissions of other recipients. This vulnerability is fixed in 1.14.6 and 1.15.2. It has a CVSS v3.1 base score of 5.4 (MEDIUM).

How severe is CVE-2025-66557? +

CVE-2025-66557 has a CVSS v3.1 score of 5.4 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-2025-66557? +

CVE-2025-66557 affects products from nextcloud, specifically: deck. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-66557? +

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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