CVE-2025-15158

High

Published: 07 January 2026

Published

07 January 2026

Modified

15 April 2026

KEV Added

—

Patch

—

CVSS Score 8.8 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS Score 0.0040 61.2th percentile

Risk Priority 18 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2025-15158 is a high-severity Unrestricted Upload of File with Dangerous Type (CWE-434) vulnerability in Wordpress (inferred from references). Its CVSS base score is 8.8 (High).

Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked in the top 38.8% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.

The strongest mitigations our analysis identified are NIST 800-53 SI-10 (Information Input Validation) and SI-2 (Flaw Remediation).

Threat & Defense at a Glance

What attackers do: exploitation maps to Exploit Public-Facing Application (T1190). What defenders deploy: see the NIST 800-53 controls recommended below.

Threat & Defense Details

Mitigating Controls (NIST 800-53 r5)AI

SI-10 Information Input Validation good match

prevent

Directly counters the improper file type validation in the wpse_file_and_ext_webp function by enforcing comprehensive input validation for file uploads.

SI-2 Flaw Remediation good match

prevent

Requires timely patching and remediation of the known flaw in the WP Enable WebP plugin, eliminating the arbitrary file upload vulnerability.

SI-3 Malicious Code Protection good match

preventdetect

Deploys malicious code protection at upload entry points to detect and eradicate arbitrary malicious files that could lead to remote code execution.

MITRE ATT&CK Enterprise TechniquesAI

T1190 Exploit Public-Facing Application Initial Access

Adversaries may attempt to exploit a weakness in an Internet-facing host or system to initially access a network.

attack.mitre.org →

Why these techniques?

Arbitrary file upload vulnerability in a public-facing WordPress plugin directly enables exploitation of public-facing applications (T1190), potentially leading to remote code execution.

Confidence: HIGH · MITRE ATT&CK Enterprise v19.0

NVD Description

The WP Enable WebP plugin for WordPress is vulnerable to arbitrary file uploads due to improper file type validation in the 'wpse_file_and_ext_webp' function in all versions up to, and including, 1.0. 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.

Deeper analysisAI

CVE-2025-15158, published on 2026-01-07, is an arbitrary file upload vulnerability in the WP Enable WebP plugin for WordPress, affecting all versions up to and including 1.0. The flaw arises from improper file type validation in the `wpse_file_and_ext_webp` function, classified under CWE-434. It carries a CVSS v3.1 base score of 8.8 (AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H), indicating high severity due to its potential for significant impact on confidentiality, integrity, and availability.

Authenticated attackers with Author-level access or higher can exploit this vulnerability over the network with low complexity and no user interaction required. By bypassing file type checks, they can upload arbitrary files to the affected site's server, which may lead to remote code execution.

Advisories and additional details are available from Wordfence at https://www.wordfence.com/threat-intel/vulnerabilities/id/fa53c5ee-fe7f-4fb2-baaa-2c1a151d4b2c?source=cve and the WordPress plugin trac browser at https://plugins.trac.wordpress.org/browser/wp-enable-webp/trunk/wp-enable-webp.php?rev=1998897#L43, which points to the vulnerable code location.