CVE-2019-25444: Fiverr Clone Script SQLi Vulnerability

CVE-2019-25444 Overview

Fiverr Clone Script version 1.2.2 developed by phpscriptsmall contains a critical SQL injection vulnerability that allows unauthenticated attackers to manipulate database queries. The vulnerability exists in the page parameter, where attackers can inject malicious SQL syntax to extract sensitive database information or modify database contents without requiring authentication.

Critical Impact

Unauthenticated attackers can exploit this SQL injection vulnerability to extract sensitive data from the database, potentially compromising user credentials, personal information, and administrative access to the application.

Affected Products

• phpscriptsmall Fiverr Clone Script version 1.2.2

Discovery Timeline

• 2026-02-20 - CVE CVE-2019-25444 published to NVD
• 2026-02-26 - Last updated in NVD database

Technical Details for CVE-2019-25444

Vulnerability Analysis

This SQL injection vulnerability (CWE-89) affects the Fiverr Clone Script web application. The flaw stems from insufficient input validation on the page parameter, which accepts user-supplied data and directly incorporates it into SQL queries without proper sanitization or parameterization. As a network-accessible vulnerability requiring no authentication, attackers can remotely target vulnerable installations through standard HTTP requests. The high confidentiality impact indicates that successful exploitation can lead to complete database compromise, including extraction of user credentials, payment information, and administrative data stored within the application.

Root Cause

The root cause of CVE-2019-25444 is improper input validation in the handling of the page parameter. The application fails to sanitize user-supplied input before incorporating it into SQL database queries. This lack of parameterized queries or prepared statements allows attackers to inject arbitrary SQL commands that the database executes with the same privileges as the application's database user. The vulnerable code path directly concatenates user input into SQL query strings, bypassing any intended security controls.

Attack Vector

The attack vector is network-based, requiring no authentication or user interaction. Attackers can craft malicious HTTP requests containing SQL injection payloads in the page parameter. The vulnerability can be exploited through standard web requests to the vulnerable endpoint. Due to the unauthenticated nature of the vulnerability, any attacker with network access to the application can attempt exploitation.

The SQL injection occurs when the application processes the page parameter without proper input sanitization. Attackers can inject SQL metacharacters such as single quotes, UNION statements, or boolean-based payloads to manipulate the underlying database queries. This can result in data exfiltration through UNION-based injection, error-based information disclosure, or blind SQL injection techniques. For detailed technical analysis and proof-of-concept information, refer to the Exploit-DB #46637 and VulnCheck SQL Injection Advisory.

Detection Methods for CVE-2019-25444

Indicators of Compromise

• HTTP requests containing SQL metacharacters (single quotes, double dashes, UNION statements) in the page parameter
• Database error messages in HTTP responses indicating SQL syntax errors
• Unusual database query patterns or execution times suggesting blind SQL injection attempts
• Unexpected data access patterns or bulk data retrieval from the database

Detection Strategies

• Implement web application firewall (WAF) rules to detect SQL injection patterns in the page parameter
• Monitor application logs for requests containing SQL keywords (UNION, SELECT, INSERT, DROP) in URL parameters
• Deploy database activity monitoring to detect unusual query patterns or unauthorized data access
• Enable verbose logging on the web application to capture and analyze suspicious requests

Monitoring Recommendations

• Configure intrusion detection systems (IDS) to alert on SQL injection attack signatures
• Implement real-time log analysis for the Fiverr Clone Script application access logs
• Monitor database server logs for query anomalies and authentication failures
• Set up alerting for unusual outbound data transfers that may indicate data exfiltration

How to Mitigate CVE-2019-25444

Immediate Actions Required

• Restrict network access to the Fiverr Clone Script application to trusted IP addresses only
• Implement a Web Application Firewall (WAF) with SQL injection protection rules
• Audit the database for signs of compromise or unauthorized access
• Review and backup critical data before applying any mitigation measures

Patch Information

No vendor patch information is currently available for CVE-2019-25444 in the Fiverr Clone Script. Organizations using this software should contact phpscriptsmall for security update availability or consider migrating to a more actively maintained alternative solution.

Workarounds

• Deploy a WAF with strict SQL injection filtering rules for all input parameters
• Implement input validation at the application level using allowlisting for the page parameter
• Use database stored procedures with parameterized queries if modifying the application code is possible
• Limit database user privileges to the minimum required for application functionality
• Consider isolating the application in a network segment with restricted outbound access

# Example WAF rule configuration for ModSecurity
SecRule ARGS:page "@rx (?i)(union|select|insert|update|delete|drop|;|--)" \
    "id:100001,phase:2,deny,status:403,msg:'SQL Injection Attempt Detected in page parameter'"