CVE-2025-12154

HIGH 8.8

Auto Thumbnailer <= 1.0 - Authenticated (Contributor+) Arbitrary File Upload

CVSS Score

8.8

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-434
Vendor	moderntribe
Product	auto thumbnailer
Published	Dec 5, 2025
Last Updated	Apr 8, 2026

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CVSS v3 Breakdown

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

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Scope

Confidentiality

Integrity

Availability

Affected Versions

moderntribe / Auto Thumbnailer

0 ≤ 1.0

References

NVD ↗ CVE.org ↗ EPSS Data ↗

wordfence.com: https://www.wordfence.com/threat-intel/vulnerabilities/id/d7c98191-bf17-4e94-88cc-ad385b1fe97d?source=cve wordpress.org: https://wordpress.org/plugins/auto-thumbnailer/

Credits

Kenneth Dunn