CVE-2024-12563 Overview
CVE-2024-12563 is a Local File Inclusion (LFI) vulnerability in the s2Member Pro plugin for WordPress. The flaw affects all plugin versions up to and including 250214. Authenticated attackers with contributor-level permissions or higher can exploit the template attribute to include and execute arbitrary files on the server. Successful exploitation enables execution of arbitrary PHP code, bypass of access controls, and disclosure of sensitive data. The vulnerability is classified under [CWE-98] (Improper Control of Filename for Include/Require Statement in PHP Program).
Critical Impact
Authenticated contributors can achieve arbitrary PHP code execution on the underlying web server, leading to full site compromise.
Affected Products
- s2Member Pro plugin for WordPress
- All versions up to and including 250214
- WordPress sites permitting contributor-level or higher user registration
Discovery Timeline
- 2025-03-18 - CVE-2024-12563 published to the National Vulnerability Database
- 2026-06-17 - Last updated in NVD database
Technical Details for CVE-2024-12563
Vulnerability Analysis
The s2Member Pro plugin exposes a shortcode or template rendering feature that accepts a user-controllable template attribute. The plugin passes this attribute into a PHP include or require statement without proper validation or path sanitization. Attackers who can author content on a WordPress site, such as contributors, authors, or editors, can inject shortcodes containing crafted template values. These values resolve to arbitrary local file paths on the server.
Because PHP include executes the target file as PHP code, any writable or attacker-controlled file on the server becomes an execution vector. This includes uploaded media, log files with injected PHP payloads, and session files. Exploitation requires only a valid low-privileged account, which is trivial to obtain on sites with open registration.
Root Cause
The root cause is improper control of a filename passed to a PHP include statement, tracked as [CWE-98]. The plugin fails to constrain the template attribute to an allowlist of known template files or a restricted directory. Path traversal sequences and absolute paths are not filtered before file inclusion occurs.
Attack Vector
An authenticated attacker submits post content or a preview request containing a shortcode with a malicious template attribute value. The attribute references a file the attacker controls, such as an uploaded image containing embedded PHP or a log file with injected payloads. When the shortcode renders, the plugin includes the file and PHP executes any code within it. Refer to the Wordfence Vulnerability Report for additional technical context.
Detection Methods for CVE-2024-12563
Indicators of Compromise
- Unexpected PHP files or webshells in wp-content/uploads/ directories
- Post or page content containing s2Member shortcodes with template attribute values referencing traversal sequences such as ../ or absolute file paths
- New administrator accounts created shortly after contributor account activity
- Outbound network connections from the web server to attacker-controlled infrastructure
Detection Strategies
- Audit the wp_posts table for shortcodes referencing the template attribute with unusual file path values
- Review WordPress user activity logs for contributor accounts creating or editing posts containing s2Member shortcodes
- Scan uploads directories for files with PHP content stored under non-PHP extensions
Monitoring Recommendations
- Enable WordPress audit logging for post creation and shortcode usage by non-administrator accounts
- Monitor web server access logs for POST requests to admin-ajax.php or preview endpoints containing the template parameter
- Alert on PHP process spawning shell utilities such as sh, bash, curl, or wget from the web server user context
How to Mitigate CVE-2024-12563
Immediate Actions Required
- Update the s2Member Pro plugin to a version released after 250214 that addresses this vulnerability
- Review all contributor, author, and editor accounts and remove any that are unrecognized or inactive
- Disable open user registration if it is not required for site operation
- Scan the WordPress installation for webshells and backdoors introduced through file inclusion
Patch Information
The vendor has released a fix documented in the S2Member Changelog. Site administrators should apply the latest plugin update through the WordPress admin dashboard or via WP-CLI. Verify the installed version exceeds 250214 after the update completes.
Workarounds
- Temporarily deactivate the s2Member Pro plugin until the patched version is installed
- Restrict content creation permissions by demoting contributor-level accounts to subscriber
- Deploy a web application firewall rule that blocks requests containing s2Member shortcodes with template attribute values referencing path traversal sequences or absolute paths
- Set the PHP open_basedir directive to restrict file inclusion to the WordPress installation directory
# Example php.ini hardening to limit file inclusion scope
open_basedir = "/var/www/html/:/tmp/"
allow_url_include = Off
allow_url_fopen = Off
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
