CVE-2025-53439 HIGH

CVE-2025-53439: WordPress Harper theme <= 1.13 - Local File Inclusion vulnerability

Vendor Axiomthemes
Product Harper
Weakness CWE-98 · PHP file inclusion
Published December 18, 2025
Last update April 28, 2026

CVSS base score

8.1/10
Attack vector Network
Attack complexity High
Privileges required None
User interaction None
Confidentiality High
Integrity High

CVSS vector

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

What the vulnerability does

01Description

Improper Control of Filename for Include/Require Statement in PHP Program ('PHP Remote File Inclusion') vulnerability in axiomthemes Harper harper allows PHP Local File Inclusion.This issue affects Harper: from n/a through <= 1.13.

Explanation of Vulnerability in Simple Terms

02Summary

Harper versions 1.13 and earlier contain a vulnerability that allows an attacker to read sensitive data, modify site content, or disrupt service availability. The attack requires network access and high technical complexity but no authentication or user interaction. The vulnerability affects the core product functionality and could compromise site integrity and confidentiality.

What an attacker can do

03Attacker Capabilities

Read sensitive data, modify site content, or cause the site to become unavailable.

Potential impact on your site

04Site Impact

Potential data breach, unauthorized content changes, or service disruption depending on attacker's objectives.

Conditions required to exploit

05Prerequisites

Network access to the site; no authentication required, but attack requires high technical complexity.

Key dates

06Disclosure timeline

December 18, 2025 CVE published
April 28, 2026 Record updated