CVE-2026-27413: Profile Builder Pro SQL Injection Flaw

CVE-2026-27413 Overview

CVE-2026-27413 is a critical Blind SQL Injection vulnerability affecting the Cozmoslabs Profile Builder Pro WordPress plugin. This vulnerability allows unauthenticated attackers to execute malicious SQL queries against the WordPress database by exploiting improper neutralization of special elements in user-supplied input. Due to the blind nature of this injection, attackers can extract sensitive data through time-based or boolean-based inference techniques without receiving direct error messages.

Critical Impact

Unauthenticated attackers can exploit this SQL injection vulnerability to extract sensitive database contents, including user credentials, personal information, and potentially gain full control over the WordPress installation.

Affected Products

• Cozmoslabs Profile Builder Pro versions through 3.13.9
• WordPress installations using vulnerable Profile Builder Pro plugin versions

Discovery Timeline

• 2026-03-19 - CVE CVE-2026-27413 published to NVD
• 2026-03-19 - Last updated in NVD database

Technical Details for CVE-2026-27413

Vulnerability Analysis

This vulnerability is classified as CWE-89: Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection'). The Profile Builder Pro plugin fails to properly sanitize user-supplied input before incorporating it into SQL queries executed against the WordPress database. Because this is a blind SQL injection, the application does not return query results or error messages directly to the attacker. Instead, exploitation relies on observing behavioral differences in the application's response—such as time delays or variations in content—to infer information about the database structure and contents.

The network-accessible attack vector combined with the absence of authentication requirements makes this vulnerability particularly dangerous for public-facing WordPress sites. Successful exploitation can lead to complete disclosure of database contents, including WordPress user accounts, hashed passwords, plugin configurations, and any custom data stored by the site.

Root Cause

The root cause of this vulnerability stems from insufficient input validation and sanitization within the Profile Builder Pro plugin. User-controlled data is concatenated directly into SQL query strings without proper parameterization or escaping. WordPress provides functions like $wpdb->prepare() specifically designed to prevent SQL injection by using prepared statements with parameterized queries. The failure to use these secure coding practices allows attackers to inject arbitrary SQL syntax through application input fields.

Attack Vector

The vulnerability is exploitable over the network by unauthenticated attackers. Blind SQL injection attacks against this vulnerability would typically involve crafting malicious input that modifies the logic of backend SQL queries. Attackers can use time-based techniques, injecting SLEEP() or BENCHMARK() functions to cause measurable delays when conditions are true, or boolean-based techniques that alter visible page content based on query results. Tools like sqlmap can automate the extraction of database information through these inference channels.

The exploitation typically progresses through several stages: first identifying injectable parameters, then determining the database structure (tables, columns), and finally extracting sensitive data such as WordPress user credentials and configuration values. For detailed technical information, refer to the Patchstack Security Advisory.

Detection Methods for CVE-2026-27413

Indicators of Compromise

• Unusual database query patterns with SQL injection payloads containing SLEEP(), BENCHMARK(), UNION SELECT, or ' OR 1=1 patterns
• Abnormally slow response times on pages utilizing Profile Builder Pro functionality
• Unexpected entries or modifications in WordPress database tables, particularly wp_users and wp_usermeta
• Web server logs showing requests with encoded SQL injection payloads targeting Profile Builder Pro endpoints

Detection Strategies

• Deploy Web Application Firewall (WAF) rules to detect and block common SQL injection patterns in requests to WordPress sites
• Implement database activity monitoring to alert on unusual query patterns, high-volume SELECT statements, or queries containing SQL injection signatures
• Review WordPress access logs for anomalous request patterns targeting Profile Builder Pro plugin URLs
• Configure intrusion detection systems to flag time-based attacks indicated by consistent response delays

Monitoring Recommendations

• Enable detailed query logging on the WordPress database server to capture potentially malicious SQL statements
• Monitor plugin directory for unauthorized file modifications that could indicate post-exploitation activity
• Set up alerts for failed authentication attempts that may follow credential extraction via SQL injection
• Implement real-time log analysis to correlate suspicious requests with database anomalies

How to Mitigate CVE-2026-27413

Immediate Actions Required

• Update Cozmoslabs Profile Builder Pro to a patched version newer than 3.13.9 immediately
• If an immediate update is not possible, temporarily disable the Profile Builder Pro plugin until a patch can be applied
• Review WordPress database logs and access logs for signs of exploitation
• Reset passwords for all WordPress administrator accounts as a precautionary measure
• Conduct a security audit of the WordPress installation to identify any indicators of compromise

Patch Information

Administrators should update the Profile Builder Pro plugin to the latest available version that addresses this vulnerability. Plugin updates can be applied through the WordPress admin dashboard under Plugins > Installed Plugins, or by manually downloading the updated plugin package from the vendor. For specific patch details, consult the Patchstack vulnerability database entry.

Workarounds

• Temporarily disable the Profile Builder Pro plugin if updating is not immediately feasible
• Implement a Web Application Firewall with SQL injection detection rules to filter malicious requests
• Restrict network access to the WordPress admin area and Profile Builder Pro endpoints using IP allowlisting
• Enable WordPress database table prefix randomization and ensure database user accounts follow the principle of least privilege

# Disable Profile Builder Pro plugin via WP-CLI
wp plugin deactivate profile-builder-pro

# Verify plugin status
wp plugin list --status=inactive | grep profile-builder

# After patching, reactivate the plugin
wp plugin activate profile-builder-pro