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.
References (2)
Core 2
Core References
Scores
CVSS v3
8.8
EPSS
0.0046
EPSS Percentile
64.0%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
no
Technical Impact
total
Details
CWE
CWE-434
Status
published
Products (1)
moderntribe/Auto Thumbnailer
< 1.0
Published
Dec 05, 2025
Tracked Since
Feb 18, 2026