CVE-2025-52833: DesignThemes LMS SQL Injection Flaw

CVE-2025-52833 Overview

CVE-2025-52833 is a critical SQL Injection vulnerability affecting the designthemes LMS WordPress theme. The vulnerability stems from improper neutralization of special elements used in SQL commands, allowing attackers to inject malicious SQL queries through the vulnerable theme components. This flaw enables unauthenticated remote attackers to manipulate database queries, potentially leading to unauthorized data access and system compromise.

Critical Impact

Unauthenticated attackers can exploit this SQL Injection vulnerability to extract sensitive data from WordPress databases, including user credentials, personally identifiable information, and other confidential content stored within LMS installations.

Affected Products

• designthemes LMS WordPress Theme versions through 9.1
• WordPress installations using vulnerable LMS theme versions
• Learning Management System deployments built on the affected theme

Discovery Timeline

• 2025-07-04 - CVE-2025-52833 published to NVD
• 2025-07-08 - Last updated in NVD database

Technical Details for CVE-2025-52833

Vulnerability Analysis

This SQL Injection vulnerability (CWE-89) exists in the designthemes LMS WordPress theme due to insufficient input sanitization. The vulnerability allows attackers to inject arbitrary SQL commands through user-controllable input fields that are passed directly to database queries without proper escaping or parameterization. The network-accessible attack vector requires no authentication or user interaction, making it particularly dangerous for publicly accessible WordPress sites running this theme. Successful exploitation can lead to high confidentiality impact through data exfiltration and low availability impact through potential database manipulation.

Root Cause

The root cause of CVE-2025-52833 is the failure to properly sanitize, escape, or parameterize user-supplied input before incorporating it into SQL queries. The LMS theme processes user input in a way that allows special SQL characters and commands to be interpreted by the database engine rather than treated as literal data. This lack of input validation enables attackers to break out of intended query structures and execute arbitrary SQL statements.

Attack Vector

The vulnerability is exploitable remotely over the network without requiring authentication or user interaction. An attacker can craft malicious HTTP requests containing SQL injection payloads targeting vulnerable parameters in the LMS theme. The scope of the vulnerability is changed, meaning successful exploitation can affect resources beyond the vulnerable component itself, potentially impacting the entire WordPress database and any applications sharing the same database server.

SQL Injection attacks against this vulnerability typically involve techniques such as UNION-based injection for data extraction, time-based blind injection for inference attacks, and error-based injection when verbose error messages are enabled. Attackers may target endpoints that accept user input for course searches, user queries, or other LMS-related functionality.

Detection Methods for CVE-2025-52833

Indicators of Compromise

• Unusual database queries in web server or database logs containing SQL syntax characters such as single quotes, UNION statements, or comment sequences
• Unexpected data extraction patterns or large query result sets in database audit logs
• Web application firewall alerts for SQL injection attempts targeting LMS theme endpoints
• Access logs showing requests with encoded SQL injection payloads in URL parameters or POST data

Detection Strategies

• Deploy web application firewall (WAF) rules specifically targeting SQL injection patterns in requests to WordPress themes
• Enable database query logging and monitor for anomalous query patterns or syntax errors indicative of injection attempts
• Implement intrusion detection system (IDS) signatures for common SQL injection attack strings
• Review WordPress access logs for requests containing suspicious characters or encoded payloads targeting theme endpoints

Monitoring Recommendations

• Configure real-time alerting for SQL injection indicators in web application firewall logs
• Monitor database performance metrics for unusual query execution times that may indicate time-based blind SQL injection probing
• Set up file integrity monitoring for WordPress theme files to detect any unauthorized modifications
• Implement log aggregation and correlation to identify SQL injection attack campaigns across multiple endpoints

How to Mitigate CVE-2025-52833

Immediate Actions Required

• Update the designthemes LMS theme to a patched version that addresses CVE-2025-52833 immediately
• Implement web application firewall rules to block SQL injection attempts as a temporary measure
• Review database access logs for evidence of prior exploitation attempts
• Consider temporarily disabling vulnerable theme functionality until patches can be applied

Patch Information

Organizations should update the designthemes LMS WordPress theme to the latest available version that addresses this SQL Injection vulnerability. For detailed vulnerability and patch information, refer to the Patchstack WordPress Vulnerability Database for specific remediation guidance.

Workarounds

• Deploy a web application firewall with SQL injection filtering rules to inspect and block malicious requests targeting the LMS theme
• Restrict access to the WordPress administrative interface and theme endpoints to trusted IP addresses where possible
• Implement database user privilege restrictions to limit the impact of potential SQL injection exploitation
• Enable WordPress security plugins that provide additional input validation and SQL injection protection layers

# Example WAF rule configuration for SQL injection mitigation
# Add to .htaccess or server configuration
RewriteEngine On
RewriteCond %{QUERY_STRING} (union.*select|select.*from|insert.*into|drop.*table) [NC,OR]
RewriteCond %{QUERY_STRING} (\'|\"|\;|\-\-|\%27|\%22) [NC]
RewriteRule ^.*$ - [F,L]