CVE-2019-25519: Jettweb PHP Script SQLi Vulnerability

CVE-2019-25519 Overview

CVE-2019-25519 is a SQL Injection vulnerability affecting Jettweb PHP Hazir Haber Sitesi Scripti V1, a PHP-based news site script. The vulnerability allows attackers to manipulate database queries by injecting malicious SQL code through the option parameter. Attackers can send POST requests to uyelik.php with crafted payloads in the option parameter to execute time-based SQL injection attacks and extract sensitive database information.

Critical Impact

Attackers can exploit this SQL injection vulnerability to extract sensitive database information, potentially including user credentials, administrative data, and other confidential records stored in the application database.

Affected Products

• Jettweb PHP Hazir Haber Sitesi Scripti V1

Discovery Timeline

• 2026-03-12 - CVE CVE-2019-25519 published to NVD
• 2026-03-12 - Last updated in NVD database

Technical Details for CVE-2019-25519

Vulnerability Analysis

This vulnerability is classified as CWE-89 (SQL Injection), a critical web application security flaw that occurs when user-supplied input is incorporated into SQL queries without proper sanitization or parameterization. The affected endpoint uyelik.php accepts POST requests containing an option parameter that is directly incorporated into database queries without adequate input validation.

The time-based blind SQL injection technique allows attackers to infer database information by analyzing response timing differences. When the injected SQL payload contains time-delay functions (such as SLEEP() in MySQL), the attacker can determine whether conditions are true or false based on how long the server takes to respond.

Root Cause

The root cause of this vulnerability lies in the application's failure to properly sanitize user input before incorporating it into SQL queries. The option parameter in uyelik.php is directly concatenated into SQL statements without using prepared statements, parameterized queries, or input validation mechanisms. This allows attackers to break out of the intended query context and inject arbitrary SQL commands.

Attack Vector

The vulnerability is exploitable over the network through HTTP POST requests directed at the uyelik.php endpoint. An unauthenticated remote attacker can craft malicious payloads within the option parameter to perform time-based blind SQL injection attacks. This attack vector requires no user interaction and can be automated to systematically extract database contents.

The time-based technique involves injecting SQL statements with conditional time delays. For example, an attacker could inject payloads that cause the database to pause execution for a specified duration when certain conditions are met, allowing character-by-character extraction of sensitive data. For detailed technical information on the exploitation method, refer to the Exploit-DB advisory #46597.

Detection Methods for CVE-2019-25519

Indicators of Compromise

• Unusual HTTP POST requests to uyelik.php containing SQL keywords such as SLEEP, BENCHMARK, WAITFOR, or IF statements in the option parameter
• Abnormal response times from the web server that may indicate time-based SQL injection attempts
• Web access logs showing repetitive requests to uyelik.php with varying payloads in rapid succession
• Database query logs revealing unusual or malformed SQL statements originating from the application

Detection Strategies

• Deploy Web Application Firewall (WAF) rules to detect and block SQL injection patterns in POST request parameters
• Implement intrusion detection system (IDS) signatures to identify time-based SQL injection attack patterns
• Configure application logging to capture all requests to uyelik.php with full parameter details for forensic analysis
• Monitor database query execution times for anomalies that may indicate exploitation attempts

Monitoring Recommendations

• Enable detailed web server access logging including POST body parameters for the affected endpoint
• Set up real-time alerting for requests containing common SQL injection signatures targeting uyelik.php
• Monitor database server performance metrics for unusual query execution patterns or timing anomalies
• Implement database activity monitoring (DAM) to track and alert on suspicious SQL query patterns

How to Mitigate CVE-2019-25519

Immediate Actions Required

• Remove or disable the uyelik.php script if it is not critical to business operations
• Implement input validation to restrict the option parameter to expected values only
• Deploy a Web Application Firewall (WAF) with SQL injection protection rules as an immediate compensating control
• Review and audit all database access code paths in the application for similar vulnerabilities

Patch Information

No official vendor patch information is available for this vulnerability. The Jettweb PHP Hazir Haber Sitesi Scripti V1 application appears to be unsupported software. Organizations using this script should consider migrating to a maintained content management system with active security support. For additional details, refer to the VulnCheck Advisory.

Workarounds

• Implement prepared statements with parameterized queries in uyelik.php to prevent SQL injection
• Apply strict input validation and whitelisting for the option parameter, rejecting any unexpected values
• Restrict network access to the vulnerable endpoint using firewall rules or .htaccess configurations
• Use a reverse proxy or WAF to filter malicious SQL injection payloads before they reach the application
• Consider disabling or removing the affected script entirely if the functionality is not essential

# Example .htaccess configuration to restrict access to vulnerable endpoint
<Files "uyelik.php">
    Order Deny,Allow
    Deny from all
    # Allow only trusted IP addresses if endpoint must remain accessible
    # Allow from 192.168.1.0/24
</Files>