#VU108685 Arbitrary file upload in External image replace - CVE-2025-4279

Vulnerability identifier: #VU108685

Vulnerability risk: Medium

CVSSv4.0: 6.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2025-4279

CWE-ID: CWE-434

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
External image replace
Web applications / Modules and components for CMS

Vendor: muromuro

Description

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to insufficient validation of file during file upload in the "external_image_replace_get_posts::replace_post" function. A remote user can upload a malicious file and execute it on the server.

Mitigation
Install update from vendor's website.

Vulnerable software versions

External image replace: 1.0.0 - 1.0.8

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External links
https://plugins.trac.wordpress.org/browser/external-image-replace/tags/1.0.8/class.php#L87
https://www.wordfence.com/threat-intel/vulnerabilities/id/ee1624fd-d98b-4953-99dc-a952dda48aa1?source=cve

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.