CVE-2025-12154
Unknown Unknown - Not Provided
BaseFortify

Publication date: 2025-12-05

Last updated on: 2025-12-08

Assigner: Wordfence

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.
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Meta Information
Published
2025-12-05
Last Modified
2025-12-08
Generated
2026-06-16
AI Q&A
2025-12-05
EPSS Evaluated
2026-06-15
NVD
CVE-2025-12154
EUVD
EUVD-2025-201365
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
modern_tribe auto_thumbnailer *
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-434 The product allows the upload or transfer of dangerous file types that are automatically processed within its environment.
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Impact Analysis

An attacker with Contributor-level access or above can upload malicious files to your server, which may lead to remote code execution. This can compromise the security of your website, allowing unauthorized control, data theft, defacement, or further attacks.

Executive Summary

This vulnerability in the Auto Thumbnailer plugin for WordPress allows authenticated users with Contributor-level access or higher to upload arbitrary files to the server because the plugin's uploadThumb() function does not properly validate file types. This can potentially lead to remote code execution on the affected site.

Mitigation Strategies

Immediate mitigation steps include disabling or removing the Auto Thumbnailer plugin from your WordPress installation, as it has been closed and removed from download availability pending a full security review. Additionally, restrict Contributor-level and higher user permissions until a patched version is available to prevent arbitrary file uploads. [1]

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