ownCloud Guests before 0.12.5 allows unauthenticated user enumeration via the /apps/guests/register/{email}/{token} endpoint. Because of insufficient validation of the supplied token in showPasswordForm, the server responds differently when an e-mail address corresponds to a valid pending guest user rather than a non-existent user.

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Fixes

Solution

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Workaround

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History

Wed, 07 Jan 2026 17:15:00 +0000

Type Values Removed Values Added
First Time appeared Owncloud guests
CPEs cpe:2.3:a:owncloud:guests:*:*:*:*:*:*:*:*
Vendors & Products Owncloud guests

Thu, 06 Nov 2025 10:15:00 +0000

Type Values Removed Values Added
First Time appeared Owncloud
Owncloud owncloud
Vendors & Products Owncloud
Owncloud owncloud

Wed, 05 Nov 2025 20:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-200
CWE-203
Metrics cvssV3_1

{'score': 5.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N'}

ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Wed, 05 Nov 2025 17:00:00 +0000

Type Values Removed Values Added
Description ownCloud Guests before 0.12.5 allows unauthenticated user enumeration via the /apps/guests/register/{email}/{token} endpoint. Because of insufficient validation of the supplied token in showPasswordForm, the server responds differently when an e-mail address corresponds to a valid pending guest user rather than a non-existent user.
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cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published:

Updated: 2025-11-05T20:10:32.262Z

Reserved: 2025-09-19T00:00:00.000Z

Link: CVE-2025-59716

cve-icon Vulnrichment

Updated: 2025-11-05T20:08:47.340Z

cve-icon NVD

Status : Analyzed

Published: 2025-11-05T17:15:44.800

Modified: 2026-01-07T17:05:23.640

Link: CVE-2025-59716

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2025-11-06T10:07:02Z

Weaknesses