CVE-2026-57748: Shopify Path Traversal Vulnerability

CVE-2026-57748 Overview

CVE-2026-57748 is a Local File Inclusion (LFI) vulnerability affecting the Shopify plugin for WordPress in versions up to and including 1.0.0. The flaw is classified under [CWE-98] (Improper Control of Filename for Include/Require Statement in PHP Program). An authenticated user with Contributor-level privileges can leverage the vulnerability to include arbitrary local files through the plugin's PHP include mechanism. Successful exploitation can lead to disclosure of sensitive configuration data, execution of code contained in server-writable files, and full compromise of the WordPress instance.

Critical Impact
A Contributor-level account can trigger arbitrary local file inclusion, exposing credentials in wp-config.php and potentially achieving remote code execution on the WordPress host.

Affected Products

WordPress Shopify plugin versions <= 1.0.0
WordPress installations running the vulnerable plugin
Sites permitting Contributor-level registrations

Discovery Timeline

2026-07-02 - CVE-2026-57748 published to NVD
2026-07-02 - Last updated in NVD database

Technical Details for CVE-2026-57748

Vulnerability Analysis

The vulnerability resides in the Shopify plugin's handling of a user-controllable parameter that is passed directly to a PHP include or require statement. Because the parameter is not validated against an allowlist or sanitized for path traversal sequences, an attacker can supply a relative path that resolves to arbitrary files on the WordPress server. The attack requires an authenticated session at Contributor level, which lowers the barrier significantly on multi-author blogs and community sites that allow self-registration.

Exploitation over the network is possible because WordPress exposes plugin endpoints through standard HTTP interfaces. An attacker who reads sensitive files such as wp-config.php obtains database credentials and authentication salts, which can be used to escalate to administrator control. When log poisoning or session file poisoning is possible, the same primitive can be turned into remote code execution.

Root Cause

The root cause is improper control of a filename passed to a PHP file inclusion statement, tracked as [CWE-98]. The plugin trusts user-supplied input to construct a file path without enforcing a fixed base directory, canonicalizing the path, or restricting the file extension. Contributor accounts, which are typically limited to draft submissions, gain access to the vulnerable code path because permission checks are missing or insufficient.

Attack Vector

The attack is delivered over the network against the WordPress site hosting the plugin. The attacker authenticates with a Contributor account, then issues a crafted request to the plugin endpoint that supplies a traversal path. The vulnerable include statement reads and executes the referenced file within the PHP interpreter context. Because no verified proof-of-concept has been published, the exact endpoint and parameter should be reviewed in the PatchStack Shopify Plugin Vulnerability advisory.

Detection Methods for CVE-2026-57748

Indicators of Compromise

HTTP requests to Shopify plugin endpoints containing path traversal sequences such as ../ or URL-encoded equivalents %2e%2e%2f
Access log entries showing Contributor-authenticated sessions requesting non-plugin file paths through plugin parameters
Unexpected reads of wp-config.php, /etc/passwd, or PHP session files by the web server process

Detection Strategies

Inspect WordPress request logs for parameters ending in .php, .log, or containing directory traversal patterns targeting the Shopify plugin routes
Alert on Contributor accounts triggering plugin endpoints that are not required for content authoring workflows
Deploy web application firewall rules that block LFI signatures and canonicalize path parameters before delivery to PHP

Monitoring Recommendations

Track newly created Contributor accounts and correlate their activity with plugin endpoint access
Monitor file access patterns of the php-fpm or Apache worker for reads outside the plugin directory
Forward WordPress and web server logs to a centralized platform for retention and correlation across sites

How to Mitigate CVE-2026-57748

Immediate Actions Required

Disable or remove the Shopify plugin on WordPress sites running version <= 1.0.0 until a patched release is confirmed
Restrict Contributor account creation and audit existing Contributor accounts for legitimacy
Rotate WordPress secrets and database credentials if wp-config.php exposure is suspected

Patch Information

No vendor patch reference is available in the enriched data at the time of publication. Consult the PatchStack Shopify Plugin Vulnerability advisory for updated fixed-version information and vendor guidance.

Workarounds

Deactivate the Shopify plugin until a fixed version is released
Apply web application firewall rules that block path traversal payloads on plugin routes
Configure PHP open_basedir to constrain file inclusion to the WordPress installation directory
Set the WordPress role for new registrations to Subscriber and disable public Contributor signup

bash

# Restrict PHP file inclusion to the WordPress directory via php.ini
open_basedir = "/var/www/html/wordpress:/tmp"

# Disable the vulnerable plugin using WP-CLI
wp plugin deactivate shopify-plugin
wp plugin delete shopify-plugin