Vulnerability · Published Dec 5, 2025 · Assigned by Wordfence

CVE-2025-12154Auto Thumbnailer <= 1.0 - Authenticated (Contributor+) Arbitrary File Upload

High 8.8

In plain English

A high-severity unrestricted file upload in Auto Thumbnailer from moderntribe. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 47% of all known vulnerabilities).

Severity (CVSS 3.1)8.8High

Exploit odds (30 days)0.6%top 53.4% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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.

Affected products (as reported)

Vendor	Product	Versions
moderntribe	Auto Thumbnailer	0 – through 1.0

Weakness: CWE-434 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

In plain English

Official description

Affected products (as reported)

References