CVE-2025-32692: WP Subscription Forms LFI Vulnerability

CVE-2025-32692 Overview

CVE-2025-32692 is a Local File Inclusion (LFI) vulnerability in the WP Shuffle WP Subscription Forms plugin for WordPress. The flaw stems from improper control of filenames used in PHP include or require statements [CWE-98]. Authenticated attackers can supply attacker-controlled paths to load arbitrary PHP files from the WordPress server. The issue affects all WP Subscription Forms versions up to and including 1.2.4. Successful exploitation can lead to disclosure of sensitive files, execution of locally available PHP payloads, and full compromise of the affected site.

Critical Impact
Authenticated attackers can include arbitrary local PHP files, exposing secrets and potentially achieving code execution on the host.

Affected Products

WP Shuffle WP Subscription Forms plugin for WordPress
All versions from initial release through 1.2.4
WordPress sites with the wp-subscription-forms plugin installed and active

Discovery Timeline

2025-04-09 - CVE-2025-32692 published to the National Vulnerability Database
2026-04-23 - Last updated in NVD database

Technical Details for CVE-2025-32692

Vulnerability Analysis

The WP Subscription Forms plugin processes user-controlled input that is passed into a PHP file inclusion call without adequate sanitization. Because the path is not constrained to an allowlist or a fixed directory, an attacker can manipulate the value to reference arbitrary files on the local filesystem. When the manipulated path resolves to a PHP file, the interpreter executes its contents in the context of the WordPress process. The vulnerability requires low-privileged authentication, which limits opportunistic mass exploitation but remains practical on multi-user WordPress installations. The Exploit Prediction Scoring System places this issue in a higher exploitation likelihood band relative to typical WordPress plugin flaws.

Root Cause

The root cause is classified under [CWE-98], Improper Control of Filename for Include/Require Statement in PHP Program. The plugin constructs a path used by include or require from request data without validating that the resolved path stays within an expected directory. There is no canonicalization check, no allowlist of permitted templates, and no filtering of traversal sequences such as ../.

Attack Vector

The attack is delivered over the network against the WordPress HTTP interface. An authenticated user submits a crafted request to a vulnerable plugin endpoint with a parameter that influences the include path. The PHP engine then loads the referenced file. Attackers commonly chain LFI with log poisoning, session file injection, or wp-config.php disclosure to escalate to remote code execution or credential theft. Refer to the Patchstack Vulnerability Report for additional technical context.

Detection Methods for CVE-2025-32692

Indicators of Compromise

HTTP requests to wp-subscription-forms plugin endpoints containing path traversal sequences such as ../ or absolute paths like /etc/passwd.
Web server access logs showing parameter values referencing wp-config.php, /proc/self/environ, or other sensitive local files.
Unexpected PHP errors referencing include() or require() with paths outside the plugin directory.
New or modified PHP files in wp-content/uploads/ following suspicious plugin requests.

Detection Strategies

Inspect WordPress and web server logs for plugin requests containing filesystem path patterns or null byte sequences.
Deploy WordPress-aware web application firewall rules that flag LFI payloads targeting plugin parameters.
Correlate authenticated low-privilege user activity with anomalous file read patterns on the host.

Monitoring Recommendations

Forward WordPress, PHP-FPM, and web server logs to a centralized analytics platform for correlation across sessions.
Alert on read access to wp-config.php, private keys, and other sensitive paths originating from the PHP worker process.
Track plugin version inventory across WordPress fleets to identify hosts running wp-subscription-forms at version 1.2.4 or earlier.

How to Mitigate CVE-2025-32692

Immediate Actions Required

Identify all WordPress instances with the WP Subscription Forms plugin installed and record the plugin version.
Deactivate and remove the plugin on sites where an updated version is not yet available.
Restrict WordPress subscriber and contributor account creation until the plugin is patched or removed.
Rotate credentials and API keys stored in wp-config.php if exploitation is suspected.

Patch Information

At the time of NVD publication, the vendor advisory listed in the Patchstack Vulnerability Report covers versions through 1.2.4. Administrators should upgrade to any vendor release published after 1.2.4 that explicitly addresses CVE-2025-32692, or remove the plugin if no fixed version is available.

Workarounds

Remove the wp-subscription-forms plugin from production WordPress sites until a patched release is installed.
Configure a web application firewall to block requests to plugin endpoints containing ../, null bytes, or absolute filesystem paths.
Apply PHP open_basedir restrictions to limit the directories accessible to the WordPress process.
Enforce least privilege for WordPress user roles and disable open registration where business requirements allow.

bash

# Configuration example: restrict PHP file access using open_basedir in php.ini
open_basedir = "/var/www/html/:/tmp/"
disable_functions = "system,exec,shell_exec,passthru,proc_open,popen"
allow_url_include = Off
allow_url_fopen = Off