CVE-2025-52722: JoinWebs Classiera SQLi Vulnerability

CVE-2025-52722 Overview

CVE-2025-52722 is a critical SQL Injection vulnerability affecting the JoinWebs Classiera WordPress theme. The vulnerability exists due to improper neutralization of special elements used in SQL commands, allowing attackers to inject malicious SQL queries through user-controlled input. This flaw enables unauthorized database access, potentially leading to data exfiltration, modification, or complete database compromise.

Critical Impact

This SQL Injection vulnerability allows unauthenticated attackers to execute arbitrary SQL commands against the WordPress database, potentially exposing sensitive user data, credentials, and enabling full database takeover.

Affected Products

• JoinWebs Classiera theme versions up to and including 4.0.34
• WordPress installations running vulnerable Classiera theme versions

Discovery Timeline

• 2025-06-27 - CVE-2025-52722 published to NVD
• 2025-06-30 - Last updated in NVD database

Technical Details for CVE-2025-52722

Vulnerability Analysis

This vulnerability stems from insufficient input validation and sanitization in the Classiera WordPress theme. When processing user-supplied data, the application fails to properly neutralize SQL metacharacters before incorporating input into database queries. This allows attackers to break out of the intended query structure and inject arbitrary SQL commands.

The vulnerability is network-exploitable without requiring authentication, meaning any remote attacker can target vulnerable installations. The attack complexity is low, making it straightforward to exploit. The scope is changed, indicating that a successful exploit can impact resources beyond the vulnerable component, potentially affecting the entire WordPress installation and underlying database server.

Root Cause

The root cause is classified under CWE-89 (Improper Neutralization of Special Elements used in an SQL Command). The Classiera theme fails to implement prepared statements or parameterized queries when constructing database queries with user input. Instead, user-controlled data is directly concatenated into SQL query strings without proper escaping or validation, creating an injection point that attackers can exploit.

Attack Vector

The attack is conducted over the network, requiring no authentication or user interaction. An attacker can craft malicious HTTP requests containing SQL injection payloads targeting vulnerable parameters in the Classiera theme. Common SQL injection techniques applicable to this vulnerability include:

• Union-based injection to extract data from other database tables
• Boolean-based blind injection to enumerate database contents
• Time-based blind injection when direct output is not available
• Error-based injection to leverage database error messages for data extraction

The vulnerability enables high confidentiality impact through unauthorized data disclosure and low availability impact through potential database manipulation or denial of service conditions.

Detection Methods for CVE-2025-52722

Indicators of Compromise

• Unusual database query patterns in WordPress/MySQL logs containing SQL keywords like UNION, SELECT, DROP, or --
• Web server access logs showing requests with encoded SQL characters (%27, %22, %3D) in theme-related URL parameters
• Database errors or exceptions logged that reference SQL syntax issues from the Classiera theme
• Unexpected database modifications or new administrative user accounts

Detection Strategies

• Deploy web application firewall (WAF) rules to detect and block common SQL injection patterns
• Enable WordPress database query logging and monitor for anomalous or malformed queries
• Implement file integrity monitoring on WordPress theme files to detect unauthorized modifications
• Review web server access logs for requests containing SQL injection signatures targeting Classiera endpoints

Monitoring Recommendations

• Configure real-time alerting for SQL error messages in application logs
• Monitor database user activity for unusual data access patterns or privilege escalation attempts
• Track outbound network connections from the web server that could indicate data exfiltration
• Implement database activity monitoring to detect bulk data extraction queries

How to Mitigate CVE-2025-52722

Immediate Actions Required

• Update the Classiera theme to a patched version beyond 4.0.34 as soon as one becomes available
• Implement a web application firewall with SQL injection protection rules
• Review database logs for signs of exploitation and rotate database credentials if compromise is suspected
• Consider temporarily disabling or replacing the Classiera theme until a patch is available

Patch Information

Organizations should monitor the Patchstack SQL Injection Advisory for updates on patch availability. Contact JoinWebs for official remediation guidance and subscribe to their security notifications for update announcements.

Workarounds

• Deploy a web application firewall (WAF) to filter malicious SQL injection payloads before they reach the application
• Restrict database user privileges for the WordPress database connection to minimize impact of successful exploitation
• Implement network-level access controls to limit exposure of the WordPress admin and theme functionality
• Enable WordPress audit logging to maintain visibility into potential exploitation attempts

# WordPress database privilege restriction example
# Create a restricted database user for WordPress
# mysql -u root -p

# REVOKE ALL PRIVILEGES ON wordpress_db.* FROM 'wp_user'@'localhost';
# GRANT SELECT, INSERT, UPDATE, DELETE ON wordpress_db.* TO 'wp_user'@'localhost';
# FLUSH PRIVILEGES;