CVE-2025-6389: Sneeit Framework WordPress Plugin RCE Flaw

CVE-2025-6389 Overview

CVE-2025-6389 is a critical Remote Code Execution (RCE) vulnerability affecting the Sneeit Framework plugin for WordPress. The vulnerability exists in all versions up to and including 8.3 and allows unauthenticated attackers to execute arbitrary code on vulnerable servers through the sneeit_articles_pagination_callback() function.

The core issue stems from improper input validation where user-supplied input is passed directly to PHP's call_user_func(), enabling attackers to invoke arbitrary functions with attacker-controlled parameters. Successful exploitation can lead to complete server compromise, including the injection of backdoors and creation of rogue administrative accounts.

Critical Impact

Unauthenticated attackers can achieve full remote code execution on affected WordPress sites, potentially leading to complete server takeover, data theft, and website defacement.

Affected Products

• Sneeit Framework plugin for WordPress versions ≤ 8.3
• WordPress sites utilizing the Flat News theme with bundled Sneeit Framework
• Any WordPress installation with the vulnerable Sneeit Framework plugin active

Discovery Timeline

• 2025-11-25 - CVE-2025-6389 published to NVD
• 2025-11-25 - Last updated in NVD database

Technical Details for CVE-2025-6389

Vulnerability Analysis

This vulnerability is classified as CWE-94 (Improper Control of Generation of Code / Code Injection). The vulnerable function sneeit_articles_pagination_callback() accepts user input through WordPress AJAX endpoints and passes this input to PHP's call_user_func() without adequate validation or sanitization.

PHP's call_user_func() is a powerful function that dynamically invokes callback functions based on the first parameter. When user-controlled input is passed to this function, attackers can specify arbitrary callable functions, effectively achieving code execution. This is particularly dangerous because the vulnerable endpoint is accessible to unauthenticated users, dramatically lowering the barrier for exploitation.

The network-accessible nature of this vulnerability, combined with the lack of authentication requirements and low attack complexity, makes it an attractive target for automated exploitation tools and opportunistic attackers scanning for vulnerable WordPress installations.

Root Cause

The root cause of this vulnerability is the direct use of unsanitized user input in a dynamic function call. The sneeit_articles_pagination_callback() function fails to implement proper input validation, allowlisting, or type checking before passing user-supplied data to call_user_func(). This pattern violates the fundamental security principle of never trusting user input, especially when that input controls program execution flow.

WordPress plugins should never pass user-controlled values to dangerous PHP functions like call_user_func(), eval(), create_function(), or similar constructs without strict validation against a known-safe allowlist.

Attack Vector

The attack is initiated over the network through WordPress AJAX endpoints. An unauthenticated attacker can craft malicious HTTP requests targeting the vulnerable pagination callback function. By manipulating the input parameters, the attacker can specify arbitrary PHP functions to be executed via call_user_func().

Exploitation typically follows this pattern:

1. Attacker identifies a WordPress site running the vulnerable Sneeit Framework plugin
2. A crafted AJAX request is sent to the WordPress admin-ajax.php endpoint
3. The malicious payload reaches sneeit_articles_pagination_callback()
4. User input is passed to call_user_func() without validation
5. The attacker-specified function executes with attacker-controlled parameters
6. Server compromise achieved - backdoors installed, admin accounts created, or other malicious actions performed

For detailed technical information, refer to the Wordfence Vulnerability Report.

Detection Methods for CVE-2025-6389

Indicators of Compromise

• Unexpected administrative user accounts appearing in WordPress
• Modified plugin files or new PHP files in unexpected directories
• Suspicious entries in web server access logs targeting admin-ajax.php with unusual payloads
• Web shell files or backdoor scripts appearing in the WordPress installation
• Outbound connections from the web server to unknown external hosts

Detection Strategies

• Monitor WordPress AJAX requests for suspicious patterns in the action parameter related to pagination callbacks
• Implement Web Application Firewall (WAF) rules to detect and block code injection attempts targeting WordPress AJAX endpoints
• Conduct regular file integrity monitoring to detect unauthorized modifications to WordPress core, theme, and plugin files
• Review server logs for POST requests to admin-ajax.php containing function names or code injection payloads

Monitoring Recommendations

• Enable verbose logging for WordPress AJAX requests and review for anomalous activity
• Deploy endpoint detection and response (EDR) solutions to monitor for suspicious process creation by web server processes
• Configure alerts for new user account creation, especially administrative accounts
• Implement network monitoring to detect unusual outbound traffic from web server hosts

How to Mitigate CVE-2025-6389

Immediate Actions Required

• Update the Sneeit Framework plugin to a patched version immediately if one is available
• If no patch is available, deactivate and remove the Sneeit Framework plugin until a fix is released
• Audit all WordPress user accounts for unauthorized administrator accounts and remove any suspicious entries
• Scan the WordPress installation for backdoors, web shells, and unauthorized file modifications
• Review server access logs for evidence of exploitation attempts

Patch Information

Check the ThemeForest Release Notes for the latest version of the Sneeit Framework plugin. Ensure you are running a version newer than 8.3 that addresses this vulnerability. The Wordfence Vulnerability Report provides additional details on affected versions and remediation guidance.

Workarounds

• Disable the Sneeit Framework plugin entirely if it cannot be updated immediately
• Implement WAF rules to block requests to WordPress AJAX endpoints containing suspicious callback function patterns
• Restrict access to admin-ajax.php where feasible, though this may impact legitimate WordPress functionality
• Consider using WordPress security plugins with virtual patching capabilities to mitigate the vulnerability until an official patch is applied

# Example: Block suspicious AJAX requests via .htaccess (use with caution)
# Add to WordPress root .htaccess file
<IfModule mod_rewrite.c>
    RewriteEngine On
    RewriteCond %{REQUEST_URI} ^.*admin-ajax\.php$ [NC]
    RewriteCond %{QUERY_STRING} sneeit_articles_pagination [NC,OR]
    RewriteCond %{REQUEST_BODY} sneeit_articles_pagination [NC]
    RewriteRule .* - [F,L]
</IfModule>