CVE-2025-2805: ORDER POST WordPress Plugin RCE Vulnerability

CVE-2025-2805 Overview

The ORDER POST plugin for WordPress contains an arbitrary shortcode execution vulnerability affecting all versions up to and including 2.0.2. This vulnerability exists due to improper validation of user input before passing it to the do_shortcode function. The flaw allows unauthenticated attackers to execute arbitrary shortcodes on the vulnerable WordPress installation, potentially leading to unauthorized actions, data exposure, or further compromise of the WordPress site.

Critical Impact

Unauthenticated attackers can execute arbitrary shortcodes without any authentication, potentially compromising WordPress site integrity, accessing sensitive data, or leveraging other installed plugins' shortcode capabilities for malicious purposes.

Affected Products

• ORDER POST plugin for WordPress version 2.0.2 and earlier
• WordPress installations with the ORDER POST plugin active

Discovery Timeline

• 2025-04-10 - CVE-2025-2805 published to NVD
• 2026-04-15 - Last updated in NVD database

Technical Details for CVE-2025-2805

Vulnerability Analysis

This vulnerability falls under CWE-94 (Improper Control of Generation of Code - Code Injection). The ORDER POST plugin fails to properly validate user-supplied input before executing it through WordPress's do_shortcode() function. This function is designed to parse and execute registered shortcodes within content, but when user input is passed directly without validation, it creates a dangerous attack surface.

The network-based attack vector allows remote exploitation without requiring authentication or user interaction. The impact encompasses confidentiality, integrity, and availability concerns, as attackers can leverage existing shortcodes from the WordPress core or other installed plugins to perform unauthorized operations.

Root Cause

The root cause of this vulnerability is insufficient input validation in the ORDER POST plugin's action handlers. The plugin allows users to trigger actions that pass unvalidated values directly to the do_shortcode() function. Without proper sanitization or whitelist validation of allowed shortcodes, attackers can inject and execute any registered shortcode on the system.

Attack Vector

The vulnerability is exploitable over the network by unauthenticated attackers. The attack flow involves sending crafted requests to the WordPress site that trigger the vulnerable action in the ORDER POST plugin. The malicious payload contains shortcode syntax that gets executed by the do_shortcode() function.

Since WordPress shortcodes can perform various operations depending on installed plugins (including database queries, file operations, or external requests), the potential impact varies based on the WordPress installation's configuration and installed plugins. Attackers could chain this vulnerability with shortcodes from other plugins to escalate their access or exfiltrate data.

The vulnerability is exploited by sending specially crafted requests containing shortcode syntax to the affected WordPress endpoint. The plugin's action handler processes this input and passes it directly to do_shortcode() without validation, causing the malicious shortcode to execute. For detailed technical analysis, refer to the Wordfence Vulnerability Report.

Detection Methods for CVE-2025-2805

Indicators of Compromise

• Unusual HTTP requests containing WordPress shortcode syntax (e.g., [shortcode] patterns) in POST parameters
• Unexpected plugin actions or behaviors triggered without authenticated user sessions
• Log entries showing access to ORDER POST plugin endpoints with suspicious payloads
• Evidence of shortcode execution from non-standard content areas

Detection Strategies

• Monitor web application logs for requests containing shortcode bracket patterns ([ and ]) in unexpected parameters
• Implement Web Application Firewall (WAF) rules to detect and block shortcode injection attempts
• Review access logs for unauthenticated requests to ORDER POST plugin endpoints
• Deploy runtime application self-protection (RASP) solutions to detect malicious shortcode execution

Monitoring Recommendations

• Enable detailed logging for WordPress plugin actions and shortcode execution
• Configure alerting for suspicious patterns in HTTP request parameters
• Monitor for unexpected database queries or file access patterns that may indicate successful exploitation
• Implement network-level monitoring for anomalous traffic to WordPress installations

How to Mitigate CVE-2025-2805

Immediate Actions Required

• Update the ORDER POST plugin to a patched version when available
• If no patch is available, deactivate and remove the ORDER POST plugin until a fix is released
• Implement WAF rules to block requests containing shortcode syntax to vulnerable endpoints
• Review server logs for evidence of exploitation attempts

Patch Information

Users should check the WordPress Plugin Repository for updated versions of the ORDER POST plugin that address this vulnerability. The vulnerable code is located in the wp_post_order.php file, as referenced in the plugin source code.

Workarounds

• Temporarily deactivate the ORDER POST plugin until an official patch is available
• Implement server-level input filtering to block shortcode syntax in request parameters
• Use a Web Application Firewall to filter malicious requests before they reach WordPress
• Restrict access to WordPress admin and plugin endpoints through IP whitelisting where feasible

# Example WAF rule to block shortcode injection attempts (ModSecurity)
SecRule ARGS "@rx \[[\w\-]+(\s+[^\]]+)?\]" "id:100001,phase:2,deny,status:403,msg:'Potential shortcode injection blocked'"