CVE-2026-27428: Eagle Booking SQLi Vulnerability

CVE-2026-27428 Overview

CVE-2026-27428 is an SQL Injection vulnerability affecting the Eagle Booking WordPress plugin developed by Eagle-Themes. This vulnerability arises from improper neutralization of special elements used in SQL commands, allowing attackers to manipulate database queries through malicious input. The vulnerability is classified under CWE-89 (SQL Injection) and affects all versions of the Eagle Booking plugin up to and including version 1.3.4.3.

SQL Injection vulnerabilities in WordPress plugins present significant risk to website owners, as they can enable unauthorized data access, data modification, or complete database compromise. Given the widespread use of WordPress as a content management system, this vulnerability could potentially affect numerous websites using the Eagle Booking plugin for reservation management.

Critical Impact

Successful exploitation could allow attackers to read, modify, or delete sensitive booking data, user credentials, and other confidential information stored in the WordPress database.

Affected Products

• Eagle Booking WordPress plugin versions through 1.3.4.3
• WordPress installations using vulnerable Eagle Booking plugin versions
• Websites utilizing eagle-booking for booking management functionality

Discovery Timeline

• 2026-03-05 - CVE-2026-27428 published to NVD
• 2026-03-05 - Last updated in NVD database

Technical Details for CVE-2026-27428

Vulnerability Analysis

This SQL Injection vulnerability exists within the Eagle Booking WordPress plugin due to insufficient input validation and sanitization. When user-supplied input is incorporated into database queries without proper escaping or parameterization, attackers can inject malicious SQL statements that alter the intended query logic.

WordPress plugins that handle booking functionality typically process numerous user inputs including dates, guest information, room selections, and search parameters. Without proper sanitization, any of these input vectors could serve as injection points for SQL attacks.

The vulnerability can be exploited by an attacker to bypass authentication mechanisms, extract sensitive data from the database, modify or delete records, and potentially escalate to broader system compromise depending on the database configuration and permissions.

Root Cause

The root cause of this vulnerability is the improper neutralization of special characters in user-supplied input before incorporating that input into SQL queries. The Eagle Booking plugin fails to adequately sanitize or parameterize database queries, allowing SQL metacharacters to be interpreted as part of the query structure rather than as literal data.

Common root cause patterns in WordPress plugin SQL injection vulnerabilities include:

• Direct concatenation of user input into SQL query strings
• Failure to use WordPress prepared statements ($wpdb->prepare())
• Inadequate escaping of special characters in database operations
• Trust of user-supplied input without validation

Attack Vector

The attack vector for this SQL Injection vulnerability involves submitting specially crafted input through the Eagle Booking plugin's user-facing interfaces. Attackers can exploit this by:

1. Identifying input fields or parameters that interact with the database
2. Crafting malicious SQL payloads designed to manipulate query logic
3. Submitting the payload through the vulnerable input vector
4. Observing the application's response to confirm successful injection
5. Extracting data or performing unauthorized database operations

The vulnerability affects versions from the initial release through 1.3.4.3, indicating that the vulnerable code path has been present throughout the plugin's development history. For detailed technical information, refer to the Patchstack vulnerability database entry.

Detection Methods for CVE-2026-27428

Indicators of Compromise

• Unusual database queries containing SQL keywords in application logs (UNION, SELECT, INSERT, DROP, etc.)
• Error messages revealing database structure or SQL syntax errors in web server logs
• Unexpected database modifications or data exfiltration attempts
• Anomalous HTTP requests with encoded SQL characters targeting booking-related endpoints

Detection Strategies

• Implement Web Application Firewall (WAF) rules to detect common SQL injection patterns
• Monitor WordPress database logs for suspicious query patterns or failed query attempts
• Deploy runtime application self-protection (RASP) solutions to detect injection attempts
• Review access logs for requests containing SQL metacharacters in query parameters

Monitoring Recommendations

• Enable detailed logging for the WordPress database connection and monitor for anomalies
• Set up alerts for HTTP requests containing common SQL injection signatures
• Monitor for changes to critical database tables, especially user credentials and booking data
• Implement file integrity monitoring to detect unauthorized plugin modifications

How to Mitigate CVE-2026-27428

Immediate Actions Required

• Audit your WordPress installation to determine if Eagle Booking plugin is installed
• Check the installed version against the vulnerable version range (through 1.3.4.3)
• Consider temporarily disabling the Eagle Booking plugin until a patched version is available
• Implement additional input validation at the web server or WAF level

Patch Information

At the time of this advisory, website administrators should monitor the Patchstack advisory for updates regarding a security patch from Eagle-Themes. WordPress administrators should ensure automatic plugin updates are enabled and regularly check for security updates to the Eagle Booking plugin.

Workarounds

• Implement Web Application Firewall rules to filter SQL injection attempts targeting the plugin
• Restrict access to booking functionality to authenticated users only where possible
• Apply database-level permissions following the principle of least privilege
• Consider using a security plugin that provides virtual patching capabilities for known vulnerabilities

# WordPress configuration: Limit database user permissions
# Ensure the WordPress database user has minimal required privileges
# Run these commands in MySQL/MariaDB as database administrator

# Create a limited user for WordPress (example)
# GRANT SELECT, INSERT, UPDATE, DELETE ON wordpress_db.* TO 'wp_user'@'localhost';
# REVOKE DROP, CREATE, ALTER ON wordpress_db.* FROM 'wp_user'@'localhost';

# Enable WordPress debug logging for monitoring
# Add to wp-config.php:
# define('WP_DEBUG', true);
# define('WP_DEBUG_LOG', true);
# define('WP_DEBUG_DISPLAY', false);