CVE-2026-22503

Received Received - Intake

Local File Inclusion Vulnerability in ThemeREX Nelson

Publication date: 2026-03-25

Last updated on: 2026-04-23

Assigner: Patchstack

Description

Improper Control of Filename for Include/Require Statement in PHP Program ('PHP Remote File Inclusion') vulnerability in ThemeREX Nelson nelson allows PHP Local File Inclusion.This issue affects Nelson: from n/a through <= 1.2.0.

CVSS Scores

EPSS Scores

Probability:
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Meta Information

Published

2026-03-25

Last Modified

2026-04-23

Generated

2026-07-06

AI Q&A

2026-03-25

EPSS Evaluated

2026-07-05

NVD

CVE-2026-22503

EUVD

EUVD-2026-15511

Affected Vendors & Products

Vendor	Product	Version / Range
themerex	nelson	to 1.2.0 (inc)
themerex	nelson	From 1.0 (inc) to 1.2.0 (inc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-98	The PHP application receives input from an upstream component, but it does not restrict or incorrectly restricts the input before its usage in "require," "include," or similar functions.

Attack-Flow Graph

Compliance Impact

CVE-2026-22503 is a Local File Inclusion vulnerability that allows attackers to include and display local files from the target website, potentially exposing sensitive information such as database credentials.

Exposure of sensitive data due to this vulnerability could lead to violations of data protection regulations like GDPR and HIPAA, which require the protection of personal and sensitive information.

Therefore, exploitation of this vulnerability may compromise compliance with these standards by risking unauthorized access to confidential data.

Mitigation Strategies

CVE-2026-22503 is a high-priority Local File Inclusion vulnerability affecting the WordPress Nelson Theme versions up to and including 1.2.0.

No official patch is currently available for this vulnerability.

Patchstack has issued a mitigation rule that can be applied to block attacks until an official patch is released and tested.

Users are advised to update the affected theme if possible or seek assistance from their hosting provider or web developer to implement mitigations.

Executive Summary

This vulnerability is an improper control of filename for include/require statements in the PHP program ThemeREX Nelson. It is a PHP Local File Inclusion (LFI) vulnerability, which means that the software allows an attacker to include files on the server through the PHP include or require functions improperly.

Impact Analysis

This vulnerability can allow an attacker to include and execute arbitrary files on the server, potentially leading to unauthorized access to sensitive information, code execution, or other malicious activities depending on the server environment and file permissions.

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