PT-2025-49296 · Nextcloud · Nextcloud

Published 2025-12-05 · Updated 2025-12-09 · CVE-2025-66545

Positive Technologies (AI Summary)

CVSS v3.1

4.3

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions Nextcloud versions prior to 14.0.11 Nextcloud versions prior to 15.3.12 Nextcloud versions prior to 16.0.15 Nextcloud versions prior to 17.0.14 Nextcloud versions prior to 18.1.8 Nextcloud versions prior to 19.1.8 Nextcloud versions prior to 20.1.2

Description Nextcloud Groupfolders allows administrators to configure folders shared with groups or teams. Prior to specific versions, a user with read-only permissions could restore files from the trash bin.

Recommendations Update to Nextcloud version 14.0.11 or later. Update to Nextcloud version 15.3.12 or later. Update to Nextcloud version 16.0.15 or later. Update to Nextcloud version 17.0.14 or later. Update to Nextcloud version 18.1.8 or later. Update to Nextcloud version 19.1.8 or later. Update to Nextcloud version 20.1.2 or later.

Exploit

Fix

Improper Neutralization

Weakness Enumeration

CWE-707

Related Identifiers

CVE-2025-66545

GHSA-2VRQ-FHMF-C49M

Affected Products

Nextcloud

References · 10

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/66xxx/CVE-2025-66545.json · Exploit
• https://github.com/nextcloud/groupfolders/pull/4076 · Patch
• https://github.com/nextcloud/groupfolders/commit/bbe87ebed8da23e9df4db637a76fbc8d36439d58 · Patch
• https://github.com/nextcloud/security-advisories/security/advisories/GHSA-2vrq-fhmf-c49m · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2025-66545 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2025-66545 · Security Note
• https://github.com/nextcloud/groupfolders/issues/4041 · Note
• https://t.me/CVEtracker/38946 · Telegram Post
• https://twitter.com/CVEnew/status/1997000962397888783 · Twitter Post
• https://twitter.com/dailycve/status/1998516561641091369 · Twitter Post