The Auto Thumbnailer plugin for WordPress is vulnerable to arbitrary file uploads due to missing file type validation in the uploadThumb() function in all versions up to, and including, 1.0. This makes it possible for authenticated attackers, with Contributor-level access and above, to upload arbitrary files on the affected site's server which may make remote code execution possible.
History

Fri, 05 Dec 2025 14:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

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


Fri, 05 Dec 2025 11:00:00 +0000

Type Values Removed Values Added
First Time appeared Wordpress
Wordpress wordpress
Vendors & Products Wordpress
Wordpress wordpress

Fri, 05 Dec 2025 05:45:00 +0000

Type Values Removed Values Added
Description The Auto Thumbnailer plugin for WordPress is vulnerable to arbitrary file uploads due to missing file type validation in the uploadThumb() function in all versions up to, and including, 1.0. This makes it possible for authenticated attackers, with Contributor-level access and above, to upload arbitrary files on the affected site's server which may make remote code execution possible.
Title Auto Thumbnailer <= 1.0 - Authenticated (Contributor+) Arbitrary File Upload
Weaknesses CWE-434
References
Metrics cvssV3_1

{'score': 8.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'}


cve-icon MITRE

Status: PUBLISHED

Assigner: Wordfence

Published: 2025-12-05T05:31:29.082Z

Updated: 2025-12-05T13:59:47.657Z

Reserved: 2025-10-24T13:06:55.464Z

Link: CVE-2025-12154

cve-icon Vulnrichment

Updated: 2025-12-05T13:58:41.900Z

cve-icon NVD

Status : Received

Published: 2025-12-05T06:16:05.877

Modified: 2025-12-05T06:16:05.877

Link: CVE-2025-12154

cve-icon Redhat

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