What is CVE-2025-4279?

CVE-2025-4279 is a high-severity vulnerability in Muromuro External Image Replace, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 8.8/10. Published 2025-05-05.

How severe is CVE-2025-4279?

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

Arbitrary file upload in Muromuro External Image Replace

CVE-2025-4279

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.

Vulnerability class: Unrestricted File Upload

EPSS: 0.007 (50.7th 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

Muromuro External Image Replace — versions 0

Weakness classification (CWE)

CWE-434 — Unrestricted Upload of File with Dangerous Type

References

Frequently asked questions

What is CVE-2025-4279?: CVE-2025-4279 is a high-severity vulnerability in Muromuro External Image Replace, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 8.8/10. Published 2025-05-05.
How severe is CVE-2025-4279?: High severity. CVSS v3 base score is 8.8 out of 10.