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Vulnerability record · CVE-2025-12138 · published 21 November 2025

CVE-2025-12138: Unrestricted file upload vulnerability

The URL Image Importer plugin for WordPress is vulnerable to arbitrary file uploads due to insufficient file type validation in all versions up to, and including, 1.0.6. This is due to the plugin relying on a user-controlled Content-Type HTTP header to validate file uploads in the 'uimptr_import_image_from_url()' function which writes the file to the server before performing proper validation. This makes it possible for authenticated attackers, with Author-level access and above, to upload arbitrary files on the affected site's server which may make remote code execution possible via the uploaded PHP file.

8.8 CVSS 3.1 High EPSS 0.69% · top 49.1% CWE-434 · Unrestricted file upload Deferred
8.8CVSS 3.1 base score
0.69%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
6References
17 Jun 2026Last modified by NVD

Description

The URL Image Importer plugin for WordPress is vulnerable to arbitrary file uploads due to insufficient file type validation in all versions up to, and including, 1.0.6. This is due to the plugin relying on a user-controlled Content-Type HTTP header to validate file uploads in the 'uimptr_import_image_from_url()' function which writes the file to the server before performing proper validation. This makes it possible for authenticated attackers, with Author-level access and above, to upload arbitrary files on the affected site's server which may make remote code execution possible via the uploaded PHP file.

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

References

LinkTags
https://plugins.trac.wordpress.org/browser/url-image-importer/trunk/url-image-importer.php#L1319
https://plugins.trac.wordpress.org/browser/url-image-importer/trunk/url-image-importer.php#L1353
https://plugins.trac.wordpress.org/browser/url-image-importer/trunk/url-image-importer.php#L1358
https://plugins.trac.wordpress.org/browser/url-image-importer/trunk/url-image-importer.php#L198
https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&old=3395852%40url-image-importer&new=339585
https://www.wordfence.com/threat-intel/vulnerabilities/id/1da18430-1bd0-4f63-9e22-5d26de2be410?source=cve

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Source: NIST National Vulnerability Database (record CVE-2025-12138), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.