CVE-2024-56278: WP Ultimate Exporter RCE Vulnerability

CVE-2024-56278 Overview

CVE-2024-56278 is a code injection vulnerability in the Smackcoders WP Ultimate Exporter plugin for WordPress. The flaw allows PHP Remote File Inclusion (RFI), enabling attackers to execute arbitrary code on affected WordPress installations. The vulnerability affects all versions of WP Ultimate Exporter up to and including 2.9.1. It is categorized under [CWE-94] Improper Control of Generation of Code. The issue was published to the National Vulnerability Database (NVD) on January 7, 2025, and Patchstack tracks it as a remote code execution (RCE) vulnerability.

Critical Impact

Authenticated attackers with high privileges can include remote PHP files and execute arbitrary code, leading to full WordPress site compromise.

Affected Products

• Smackcoders WP Ultimate Exporter (wp-ultimate-exporter) plugin for WordPress
• All versions from initial release through 2.9.1
• WordPress sites with the vulnerable plugin installed and active

Discovery Timeline

• 2025-01-07 - CVE-2024-56278 published to NVD
• 2026-04-23 - Last updated in NVD database

Technical Details for CVE-2024-56278

Vulnerability Analysis

The vulnerability resides in the WP Ultimate Exporter WordPress plugin developed by Smackcoders Inc. The plugin fails to properly control the generation of code when processing input used in file inclusion operations. Attackers supply attacker-controlled values that the plugin passes into a PHP include or require construct without sanitization. This allows the inclusion of remote PHP files hosted on attacker-controlled infrastructure.

When the malicious remote file is included, the PHP interpreter executes its contents within the WordPress application context. The result is arbitrary code execution on the underlying web server. The Exploit Prediction Scoring System (EPSS) places this issue in the 97th percentile, indicating elevated likelihood of exploitation activity in the wild.

Root Cause

The plugin uses unvalidated user-supplied input as part of a file path passed to a PHP include or require function. PHP's allow_url_include behavior, combined with the absence of allowlisting, lets attackers reference URLs as inclusion targets. The lack of input validation and sanitization on these parameters is the root cause classified under [CWE-94].

Attack Vector

The attack is delivered over the network against the WordPress administrative interface or plugin endpoints exposed by wp-ultimate-exporter. Exploitation requires high privileges, meaning the attacker must hold an authenticated session with elevated WordPress capabilities. Once authenticated, the attacker submits a crafted request that supplies a remote URL pointing to a malicious PHP payload. The plugin includes the remote file, and the payload executes server-side, granting the attacker code execution under the web server user.

The vulnerability mechanism is documented in the Patchstack Vulnerability Report. No verified public proof-of-concept code is currently linked in the advisory.

Detection Methods for CVE-2024-56278

Indicators of Compromise

• Outbound HTTP or HTTPS requests from the web server process (php-fpm, apache2, httpd) to unfamiliar external hosts during plugin operation
• New or modified PHP files inside wp-content/uploads/, wp-content/plugins/wp-ultimate-exporter/, or other writable WordPress directories
• Web server access logs showing requests to wp-ultimate-exporter endpoints containing URL-encoded http:// or https:// parameter values
• Unexpected administrator account creation or modifications to WordPress core options following plugin requests

Detection Strategies

• Inspect WordPress access logs for requests targeting wp-ultimate-exporter paths that include external URLs in query or POST parameters
• Hunt for PHP processes spawning shells (sh, bash) or network utilities (curl, wget) that are uncommon for the WordPress baseline
• Correlate authenticated administrator session events with subsequent outbound network calls from the web server
• Monitor file integrity on plugin directories and wp-content/ to detect webshell drops

Monitoring Recommendations

• Enable PHP error and access logging with parameter capture to retain forensic evidence of inclusion attempts
• Forward web server, PHP, and WordPress audit logs to a centralized SIEM for correlation and retention
• Alert on any successful HTTP 200 response from wp-ultimate-exporter endpoints paired with outbound connections to non-allowlisted destinations
• Track plugin version inventory across hosted WordPress instances to identify unpatched assets

How to Mitigate CVE-2024-56278

Immediate Actions Required

• Update WP Ultimate Exporter to a version newer than 2.9.1 once the vendor publishes a fixed release
• Deactivate and remove the wp-ultimate-exporter plugin if a patched version is not yet available
• Rotate WordPress administrator credentials and review all privileged accounts for unauthorized changes
• Audit the web server filesystem for webshells or unauthorized PHP files added after the vulnerability was disclosed

Patch Information

Refer to the Patchstack Vulnerability Report for the current patch status. The advisory identifies all versions through 2.9.1 as vulnerable. Apply any vendor-released update from Smackcoders as soon as it becomes available, and verify the installed plugin version through the WordPress admin Plugins page.

Workarounds

• Disable allow_url_include and allow_url_fopen in the server php.ini configuration to block remote file inclusion at the PHP runtime level
• Restrict access to WordPress administrator interfaces using IP allowlists or VPN-only access
• Deploy a web application firewall (WAF) rule that blocks requests to wp-ultimate-exporter endpoints containing URL schemes in parameter values
• Remove unused administrator accounts and enforce multi-factor authentication for remaining privileged users

# Configuration example: harden PHP against remote file inclusion
# Edit /etc/php/<version>/fpm/php.ini or equivalent
allow_url_fopen = Off
allow_url_include = Off

# Reload PHP-FPM to apply
sudo systemctl reload php-fpm