Nextcloud is an open source content collaboration platform. In Nextcloud Server from versions 32.0.0 to before 32.0.2, and 33.0.0 to before 33.0.1, the files_lock app did not properly validate the ownership of files when processing DAV lock and unlock requests. An authenticated user could lock or unlock files belonging to other users by targeting their absolute WebDAV paths. Additionally, lock tokens were disclosed to unauthorized callers in error responses, allowing attackers to remove token-based locks placed by other users' client applications. It is recommended that the Nextcloud Server is upgraded to 32.0.2 or 33.0.1. It is recommended that the Nextcloud Enterprise Server is upgraded to 31.0.14.4 or 32.0.2 or 33.0.1
History

Wed, 03 Jun 2026 17:15:00 +0000

Type Values Removed Values Added
First Time appeared Nextcloud nextcloud Server
CPEs cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:-:*:*:*
cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:enterprise:*:*:*
Vendors & Products Nextcloud nextcloud Server

Wed, 03 Jun 2026 02:30:00 +0000

Type Values Removed Values Added
First Time appeared Nextcloud
Nextcloud files Lock
Vendors & Products Nextcloud
Nextcloud files Lock

Mon, 01 Jun 2026 22:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Mon, 01 Jun 2026 19:00:00 +0000

Type Values Removed Values Added
Description Nextcloud is an open source content collaboration platform. In Nextcloud Server from versions 32.0.0 to before 32.0.2, and 33.0.0 to before 33.0.1, the files_lock app did not properly validate the ownership of files when processing DAV lock and unlock requests. An authenticated user could lock or unlock files belonging to other users by targeting their absolute WebDAV paths. Additionally, lock tokens were disclosed to unauthorized callers in error responses, allowing attackers to remove token-based locks placed by other users' client applications. It is recommended that the Nextcloud Server is upgraded to 32.0.2 or 33.0.1. It is recommended that the Nextcloud Enterprise Server is upgraded to 31.0.14.4 or 32.0.2 or 33.0.1
Title Nextcloud: Files Lock app allows users to lock and unlock files of other users
Weaknesses CWE-287
References
Metrics cvssV3_1

{'score': 6.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L'}


cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published: 2026-06-01T16:53:50.656Z

Updated: 2026-06-01T21:42:51.254Z

Reserved: 2026-05-11T18:41:13.158Z

Link: CVE-2026-45283

cve-icon Vulnrichment

Updated: 2026-06-01T21:41:54.940Z

cve-icon NVD

Status : Analyzed

Published: 2026-06-01T19:16:50.523

Modified: 2026-06-03T17:02:29.153

Link: CVE-2026-45283

cve-icon Redhat

No data.