CVE-2020-37076: Victor CMS SQL Injection Vulnerability

CVE-2020-37076 Overview

Victor CMS version 1.0 contains a SQL injection vulnerability in the post parameter on post.php that allows remote attackers to manipulate database queries. Attackers can exploit this vulnerability by sending crafted UNION SELECT payloads to extract database information through boolean-based, error-based, and time-based injection techniques.

Critical Impact

Remote attackers can extract sensitive database information, potentially including user credentials, personal data, and administrative access tokens through SQL injection attacks without authentication.

Affected Products

• Victor CMS version 1.0
• Installations using the vulnerable post.php endpoint
• Any derivative or forked versions based on the vulnerable codebase

Discovery Timeline

• 2026-02-03 - CVE-2020-37076 published to NVD
• 2026-02-04 - Last updated in NVD database

Technical Details for CVE-2020-37076

Vulnerability Analysis

This SQL injection vulnerability (CWE-89: Improper Neutralization of Special Elements used in an SQL Command) exists within the post.php file of Victor CMS version 1.0. The application fails to properly sanitize user-supplied input in the post parameter before incorporating it into SQL queries. This lack of input validation enables attackers to inject malicious SQL code that gets executed by the database server.

The vulnerability supports multiple injection techniques including boolean-based blind injection (where attackers infer data through true/false responses), error-based injection (extracting data through database error messages), and time-based blind injection (using database sleep functions to infer data). These attack methods allow comprehensive database enumeration and data exfiltration.

Root Cause

The root cause of this vulnerability is the direct inclusion of user-supplied input from the post parameter into SQL queries without proper sanitization or parameterized query usage. The post.php script constructs dynamic SQL statements by concatenating user input directly into the query string, violating secure coding practices for database interactions.

Attack Vector

The attack is conducted over the network without requiring authentication or user interaction. An attacker can craft malicious HTTP requests to the post.php endpoint with specially formed SQL injection payloads in the post parameter.

The exploitation technique leverages UNION SELECT statements to append additional queries that extract data from other database tables. Boolean-based injection determines data character-by-character based on application response differences, while time-based injection uses conditional database delays to infer information when no visible output differences exist.

For detailed technical analysis of the exploitation methodology, refer to the Exploit-DB #48451 entry and the VulnCheck Advisory for Victor CMS.

Detection Methods for CVE-2020-37076

Indicators of Compromise

• HTTP requests to post.php containing SQL keywords such as UNION, SELECT, SLEEP(), WAITFOR, or BENCHMARK()
• Unusual database error messages appearing in application logs or HTTP responses
• Requests with encoded SQL injection payloads (URL encoding, hex encoding) in the post parameter
• Database query logs showing unexpected UNION SELECT statements or information_schema queries

Detection Strategies

• Deploy Web Application Firewall (WAF) rules to detect and block SQL injection patterns in HTTP parameters
• Implement application-level logging to capture all requests to post.php with parameter values
• Configure database query logging to identify anomalous query patterns indicative of injection attacks
• Use intrusion detection systems (IDS) with SQL injection signature rules

Monitoring Recommendations

• Monitor web server access logs for requests to post.php with unusually long or malformed post parameter values
• Set up alerts for database errors related to SQL syntax violations or unexpected query structures
• Track network traffic for patterns consistent with automated SQL injection tools like sqlmap
• Review application logs for sequential requests that may indicate blind SQL injection enumeration

How to Mitigate CVE-2020-37076

Immediate Actions Required

• Remove or restrict access to the post.php endpoint until a patch is applied
• Implement input validation and sanitization for all user-supplied parameters
• Deploy WAF rules specifically targeting SQL injection payloads against the affected endpoint
• Consider taking the application offline if it processes sensitive data until properly remediated

Patch Information

No official vendor patch has been confirmed for this vulnerability. The Victor CMS project is available on GitHub CMSsite Repository. Organizations using this CMS should review the codebase and implement proper SQL injection defenses manually, or migrate to an actively maintained CMS solution.

Workarounds

• Implement prepared statements with parameterized queries for all database operations in post.php
• Apply strict input validation using allowlists for expected post parameter values
• Deploy a Web Application Firewall with SQL injection protection rules in front of the application
• Restrict database user privileges to minimum required operations (principle of least privilege)
• Consider disabling or removing the vulnerable post.php functionality if not business-critical

# Example: Apache ModSecurity WAF rule to block SQL injection attempts
SecRule ARGS:post "@detectSQLi" \
    "id:1001,\
    phase:2,\
    block,\
    msg:'SQL Injection Detected in post parameter',\
    logdata:'Matched Data: %{MATCHED_VAR}',\
    severity:CRITICAL"