CVE-2025-3280

Executive Summary

CVE-2025-3280 is a critical SQL Injection vulnerability discovered in the ELEX WooCommerce Advanced Bulk Edit Products, Prices & Attributes plugin for WordPress. This flaw affects all versions up to and including 1.4.9. The vulnerability resides in the attribute_value_filter parameter, which is insufficiently sanitized and not properly prepared for SQL queries. An authenticated attacker with Subscriber-level access or higher can exploit this to inject arbitrary SQL commands, leading to the extraction of sensitive information from the WordPress database, such as user credentials, session tokens, and other confidential data.

As this is a WordPress plugin vulnerability, the attack surface is limited to WordPress installations running the affected plugin. The EPSS score of 0.0% indicates low exploitation likelihood in the wild at the time of analysis, but the lack of a patch makes it a high-priority target for threat actors.

Supply Chain & Package Security

This vulnerability is specific to the WordPress plugin ecosystem. The plugin is distributed via the official WordPress plugin repository and third-party marketplaces. Users should verify the integrity of their plugin files and monitor for updates from the vendor. No open-source patch data or GitHub advisory is available, increasing the risk for unmanaged installations.

CVSS Breakdown & Threat Level

• CVSS Score: 6.5 (Medium)
• Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
• Attack Vector: Network
• Attack Complexity: Low
• Privileges Required: Low (Subscriber-level)
• User Interaction: None
• Scope: Unchanged
• Confidentiality Impact: High
• Integrity Impact: None
• Availability Impact: None

The medium severity rating is due to the requirement for authentication, but the low complexity and high confidentiality impact make it a significant threat for WordPress sites with untrusted user registrations.

Deep Dive & Mechanics

The vulnerability is a classic SQL Injection flaw in the attribute_value_filter parameter. The plugin likely constructs a SQL query to filter products by attribute values without using parameterized queries or prepared statements. The insufficient escaping allows an attacker to break out of the intended SQL syntax and append malicious payloads.

Root Cause: The attribute_value_filter parameter is passed directly into a SQL query without proper sanitization or use of $wpdb->prepare(). This is a common oversight in WordPress plugin development.

Attack Vector: An authenticated user (Subscriber or higher) sends a crafted HTTP request to the plugin's AJAX endpoint or admin page that processes bulk edits. The attribute_value_filter parameter is manipulated to include SQL injection payloads.

Impact: Successful exploitation allows the attacker to:

• Extract usernames and password hashes from the wp_users table.
• Retrieve session tokens and other sensitive data.
• Potentially escalate privileges by modifying user roles.
• Perform blind SQL injection to enumerate the database structure.

Vulnerable vs. Patched Code

Since no patch is available, the vulnerable code is presumed to be similar to the following pattern:

Vulnerable Code (PHP):

$attribute_value = $_POST['attribute_value_filter'];
$query = "SELECT * FROM {$wpdb->prefix}postmeta WHERE meta_key = 'attribute' AND meta_value = '$attribute_value'";
$results = $wpdb->get_results($query);

Patched Code (Hypothetical):

$attribute_value = sanitize_text_field($_POST['attribute_value_filter']);
$query = $wpdb->prepare(
    "SELECT * FROM {$wpdb->prefix}postmeta WHERE meta_key = 'attribute' AND meta_value = %s",
    $attribute_value
);
$results = $wpdb->get_results($query);

The patched version uses $wpdb->prepare() with a placeholder (%s) to safely bind the parameter, preventing SQL injection.

Exploitation & Lab Setup

Red Team (Exploitation)

Prerequisites:

• WordPress installation with ELEX WooCommerce Advanced Bulk Edit Products, Prices & Attributes plugin version <= 1.4.9.
• Valid user account with Subscriber role or higher.
• Access to the plugin's AJAX endpoint (e.g., /wp-admin/admin-ajax.php).

Exploitation Steps:

1. Identify the vulnerable endpoint: Use browser developer tools or intercept traffic to find the AJAX action that processes the attribute_value_filter parameter. Common actions include elex_bulk_edit_products or similar.

2. Craft the payload: Inject a SQL query to extract data. For example, to retrieve admin usernames and password hashes:

   attribute_value_filter=test' UNION SELECT user_login, user_pass, NULL, NULL FROM wp_users--
   

3. Send the request: Use curl or a tool like Burp Suite:

   curl -X POST http://target.com/wp-admin/admin-ajax.php \
   -d "action=elex_bulk_edit&attribute_value_filter=test' UNION SELECT user_login, user_pass, NULL, NULL FROM wp_users--"
   

4. Extract data: The response will contain the injected data in the output.

Note: No public exploit code is available, so this is a conceptual demonstration.

Blue Team (Detection & Defense)

Detection:

• Monitor for unusual SQL error messages in WordPress logs.
• Look for HTTP requests to /wp-admin/admin-ajax.php with suspicious attribute_value_filter parameters containing SQL keywords (e.g., UNION, SELECT, --).
• Use WAF rules to block requests with SQL injection patterns.

Defense:

• Immediately disable the plugin if no patch is available.
• Restrict user registration to trusted users only.
• Implement a Web Application Firewall (WAF) with SQL injection signatures.
• Monitor database query logs for anomalies.

Indicators of Compromise (IOCs)

• Network IOCs:
  • HTTP POST requests to /wp-admin/admin-ajax.php with action parameter related to bulk editing.
  • attribute_value_filter parameter containing SQL keywords or special characters like ', UNION, SELECT, --.
• File IOCs:
  • Modified plugin files in /wp-content/plugins/elex-woocommerce-bulk-edit-products-prices-attributes/.
  • Unexpected entries in WordPress error logs (/wp-content/debug.log).
• Database IOCs:
  • Unusual queries in the MySQL slow query log.
  • New user accounts with elevated privileges.

Detection Engineering

YARA Rule

rule CVE_2025_3280_SQLi_WordPress {
    meta:
        description = "Detects SQL injection attempts targeting CVE-2025-3280 in ELEX WooCommerce Bulk Edit plugin"
        author = "Valters IT"
        date = "2025-04-10"
        reference = "CVE-2025-3280"
    strings:
        $sqli1 = /attribute_value_filter=.*['\"]\s*(UNION|SELECT|INSERT|UPDATE|DELETE|DROP|--|#)/i
        $sqli2 = /attribute_value_filter=.*\b(OR|AND)\b.*=.*/i
    condition:
        any of them
}

Sigma Rule

title: CVE-2025-3280 SQL Injection Attempt
id: 8f7a3b2c-1d4e-5f6a-7b8c-9d0e1f2a3b4c
status: experimental
description: Detects SQL injection attempts against the ELEX WooCommerce Bulk Edit plugin
author: Valters IT
logsource:
    category: webserver
    product: apache
    service: access_combined
detection:
    selection:
        cs-method: 'POST'
        cs-uri-query|contains: '/wp-admin/admin-ajax.php'
        cs-uri-query|contains: 'action=elex_bulk_edit'
        cs-uri-query|contains: 'attribute_value_filter'
        cs-uri-query|re: 'attribute_value_filter=.*['\''\"]\s*(UNION|SELECT|INSERT|UPDATE|DELETE|DROP|--|#)'
    condition: selection
falsepositives:
    - Legitimate use of special characters in attribute values (rare)
level: high

Suricata Rule

alert http any any -> any any (msg:"CVE-2025-3280 SQL Injection Attempt"; flow:to_server; content:"POST"; http_method; content:"/wp-admin/admin-ajax.php"; http_uri; content:"action=elex_bulk_edit"; http_client_body; content:"attribute_value_filter"; pcre:"/attribute_value_filter=.*['\''\"]\s*(UNION|SELECT|INSERT|UPDATE|DELETE|DROP|--|#)/i"; sid:1000001; rev:1;)

Remediation & Mitigation

Immediate Actions:

1. Disable the plugin until a patch is released by the vendor.
2. Restrict user registration to prevent untrusted Subscriber accounts.
3. Implement a WAF with custom rules to block SQL injection patterns.

Long-term Fix:

• The vendor must release a patched version that uses $wpdb->prepare() or parameterized queries.
• Users should monitor the WordPress plugin repository for updates.

Workaround:

• If the plugin cannot be disabled, modify the plugin code to add input sanitization (e.g., sanitize_text_field()) and use $wpdb->prepare() for all database queries.

Valters IT
Securing Digital Frontiers