CVE-2025-69067

Executive Summary

CVE-2025-69067 is a critical PHP Local File Inclusion (LFI) vulnerability discovered in the Tails theme by AncoraThemes, a WordPress ecosystem component. The vulnerability stems from improper control of filenames used in PHP include/require statements, allowing an unauthenticated attacker to include arbitrary local files from the server. This can lead to sensitive information disclosure (e.g., /etc/passwd, configuration files) and, in some cases, remote code execution if combined with file upload capabilities. The CVSS score of 8.1 (High) reflects the low attack complexity and network-based vector. No public proof-of-concept (PoC) or patch is currently available, making this a high-priority unpatched threat for WordPress sites using the Tails theme version 1.4.12 or earlier.

Supply Chain & Package Security

This vulnerability affects the WordPress theme ecosystem. The Tails theme is distributed via WordPress theme repositories and third-party marketplaces. Users should verify the integrity of their theme files and monitor for official updates from AncoraThemes. Since no patch is available, immediate mitigation steps are critical.

CVSS Breakdown & Threat Level

• CVSS Score: 8.1 (High)
• Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
• Attack Vector: Network (AV:N) – exploitable remotely.
• Attack Complexity: Low (AC:L) – no special conditions required.
• Privileges Required: None (PR:N) – unauthenticated.
• User Interaction: None (UI:N) – no user action needed.
• Scope: Unchanged (S:U) – vulnerability affects only the vulnerable component.
• Confidentiality Impact: High (C:H) – full file read access.
• Integrity Impact: High (I:H) – potential for file modification if combined with other flaws.
• Availability Impact: High (A:H) – could lead to denial of service via resource exhaustion.

Threat Level: Critical due to unpatched status and ease of exploitation.

Deep Dive & Mechanics

The vulnerability exists in the Tails theme's PHP code, likely in a file that handles dynamic includes based on user-supplied input (e.g., via $_GET, $_POST, or $_COOKIE). The improper control of filenames allows path traversal sequences (e.g., ../../etc/passwd) to be passed to PHP's include() or require() functions.

Root Cause: The theme fails to sanitize or validate the filename parameter before using it in an include statement. This is a classic CWE-98 (PHP Remote File Inclusion) but is limited to local files due to allow_url_include being disabled by default in modern PHP configurations.

Attack Vector: An attacker crafts a malicious HTTP request to a vulnerable endpoint, such as:

GET /wp-content/themes/tails/?template=../../../../etc/passwd HTTP/1.1

The server then includes the specified file, outputting its contents in the response.

Impact: Full read access to server files, including:

• /etc/passwd (user enumeration)
• /etc/shadow (if permissions allow)
• WordPress configuration files (wp-config.php) containing database credentials
• Log files that may contain session tokens or other sensitive data

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
// vulnerable.php
$template = $_GET['template'];
include("templates/" . $template . ".php");
?>

Patched Code (recommended):

<?php
// patched.php
$allowed_templates = array('home', 'single', 'page');
$template = $_GET['template'];
if (in_array($template, $allowed_templates)) {
    include("templates/" . $template . ".php");
} else {
    // Default template
    include("templates/home.php");
}
?>

Key Differences:

• Input Validation: Patched code uses a whitelist of allowed templates.
• Path Traversal Prevention: Patched code does not concatenate user input directly into the file path.
• Error Handling: Patched code falls back to a default template if the input is invalid.

Exploitation & Lab Setup

Red Team (Offensive)

Lab Setup:

1. Install WordPress with the Tails theme version 1.4.12.
2. Ensure allow_url_include is Off (default).
3. Use a tool like Burp Suite or curl.

Exploitation Steps:

1. Identify the vulnerable parameter (e.g., template, page, file).
2. Send a request with path traversal:

   curl -v "http://target/wp-content/themes/tails/?template=../../../../etc/passwd"
   

3. If successful, the response will contain the contents of /etc/passwd.

Advanced Exploitation:

• Use PHP wrappers for code execution (if allow_url_include is On):

  ?template=php://input&cmd=system('id');
  

• Combine with file upload to achieve RCE (upload a PHP shell via another vulnerability, then include it).

Blue Team (Defensive)

Detection:

• Monitor web server logs for suspicious ../ patterns in GET/POST parameters.
• Look for requests to theme files with unexpected parameters.
• Use WAF rules to block path traversal sequences.

Hunting:

• Search for include( or require( in theme files that use user input.
• Check for files like template-loader.php or functions.php in the Tails theme directory.

Response:

• Immediately disable the Tails theme and switch to a default WordPress theme.
• Review server logs for signs of exploitation.
• Rotate any credentials that may have been exposed.

Indicators of Compromise (IOCs)

File-Based IOCs:

• Suspicious entries in web server access logs containing ../ or ..%2f in query strings.
• Unexpected files in the WordPress uploads directory (e.g., PHP shells).
• Modified theme files (check file integrity with checksums).

Network IOCs:

• Outbound connections from the web server to unknown IPs (if RCE achieved).
• Unusual HTTP requests to /wp-content/themes/tails/ with parameters like template, page, or file.

Log IOCs:

• Apache/Nginx logs showing requests like:

  GET /wp-content/themes/tails/?template=../../../../etc/passwd HTTP/1.1
  

• PHP error logs showing failed includes or warnings about open_basedir restrictions.

Detection Engineering

YARA Rule

rule CVE_2025_69067_LFI_Tails {
    meta:
        description = "Detects attempts to exploit CVE-2025-69067 in AncoraThemes Tails theme"
        author = "Valters IT"
        date = "2025-04-10"
        severity = "high"
    strings:
        $path_traversal = /\.\.\/\.\.\/\.\.\/\.\.\/(etc|var|proc|home|root)/ nocase
        $vuln_param = /(template|page|file|include)=/ nocase
        $php_wrapper = /php:\/\/(input|filter|stdin)/ nocase
    condition:
        any of ($path_traversal) and any of ($vuln_param) or any of ($php_wrapper)
}

Sigma Rule

title: CVE-2025-69067 LFI Attempt on Tails Theme
id: 7a8b9c0d-1e2f-3a4b-5c6d-7e8f9a0b1c2d
status: experimental
description: Detects HTTP requests attempting to exploit LFI in AncoraThemes Tails theme
author: Valters IT
date: 2025-04-10
logsource:
    category: webserver
    product: apache
    service: access
detection:
    selection:
        cs-uri-query|contains:
            - 'template='
            - 'page='
            - 'file='
        cs-uri-query|re: '\.\.\/'
    condition: selection
falsepositives:
    - Legitimate use of path traversal in other applications (rare)
level: high

Suricata Rule

alert http any any -> any any (msg:"CVE-2025-69067 LFI Attempt on Tails Theme"; flow:to_server,established; content:"/wp-content/themes/tails/"; http_uri; pcre:"/(template|page|file)=.*\.\.\//Ui"; classtype:attempted-recon; sid:1000001; rev:1;)

Remediation & Mitigation

Immediate Actions:

1. Disable the Tails theme and switch to a default WordPress theme (e.g., Twenty Twenty-Four).
2. Implement a Web Application Firewall (WAF) rule to block path traversal patterns in query strings.
3. Restrict file permissions on sensitive files (e.g., wp-config.php should be 640 or 600).

Long-Term Fixes:

• Apply vendor patch when available from AncoraThemes.
• Code review all custom themes for similar LFI vulnerabilities.
• Use a security plugin like Wordfence or Sucuri to monitor for exploitation attempts.

Configuration Hardening:

• Set open_basedir in php.ini to restrict file access to the web root.
• Disable allow_url_include (already default Off).
• Enable display_errors Off in production to prevent information leakage.

Monitoring:

• Enable detailed logging for web server and PHP errors.
• Set up alerts for multiple failed login attempts or unusual file access patterns.

Valters IT signature: This report is generated by an AI assistant specialized in DevSecOps and Cyber Threat Intelligence. All information is based on available data and should be verified before action.