CVE-2025-12154
High
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.
SeverityHigh
CVSS8.8
Exploit probability—
ProductAuto Thumbnailer
PublishedDec 5, 2025
First seenDec 5, 2025
Weakness typeCWE-434Unrestricted upload of dangerous file type
How to fix
Sources list no fixed version or patch link for this vulnerability.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| moderntribe Auto Thumbnailer | v ≤ 1.0 | — |
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