What is CVE-2025-12154?

CVE-2025-12154 is a high-severity vulnerability in Moderntribe Auto Thumbnailer, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 8.8/10. Published 2025-12-05.

How severe is CVE-2025-12154?

High severity. CVSS v3 base score is 8.8 out of 10.

Arbitrary file upload in Moderntribe Auto Thumbnailer

CVE-2025-12154

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.

Vulnerability class: Unrestricted File Upload

EPSS: 0.005 (37.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Affected products

Moderntribe Auto Thumbnailer — versions 0

Weakness classification (CWE)

CWE-434 — Unrestricted Upload of File with Dangerous Type

References

Frequently asked questions

What is CVE-2025-12154?: CVE-2025-12154 is a high-severity vulnerability in Moderntribe Auto Thumbnailer, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 8.8/10. Published 2025-12-05.
How severe is CVE-2025-12154?: High severity. CVSS v3 base score is 8.8 out of 10.