CVE-2025-4279: External image replace <= 1.0.8 - Authenticated (Contributor+) Arbitrary File Upload
Description
The External image replace plugin for WordPress is vulnerable to arbitrary file uploads due to missing file type validation in the 'external_image_replace_get_posts::replace_post' function in all versions up to, and including, 1.0.8. This makes it possible for authenticated attackers, with contributor-level and above permissions, to upload arbitrary files on the affected site's server which may make remote code execution possible.
Classification
CVE ID: CVE-2025-4279
CVSS Base Severity: HIGH
CVSS Base Score: 8.8
CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Problem Types
CWE-434 Unrestricted Upload of File with Dangerous TypeAffected Products
Vendor: muromuro
Product: External image replace
Exploit Prediction Scoring System (EPSS)
EPSS Score: 0.16% (probability of being exploited)
EPSS Percentile: 37.64% (scored less or equal to compared to others)
EPSS Date: 2025-06-03 (when was this score calculated)
Stakeholder-Specific Vulnerability Categorization (SSVC)
SSVC Exploitation: none
SSVC Technical Impact: total
SSVC Automatable: false
References
https://nvd.nist.gov/vuln/detail/CVE-2025-4279https://www.wordfence.com/threat-intel/vulnerabilities/id/ee1624fd-d98b-4953-99dc-a952dda48aa1?source=cve
https://plugins.trac.wordpress.org/browser/external-image-replace/tags/1.0.8/class.php#L87