CVE-2019-25511: Jettweb PHP Script SQLi Vulnerability

CVE-2019-25511 Overview

CVE-2019-25511 is a SQL injection vulnerability in Jettweb PHP Hazir Haber Sitesi Scripti V3, a Turkish news site content management script. The vulnerability allows unauthenticated attackers to manipulate database queries by injecting SQL code through the videoid parameter. Attackers can send GET requests to fonksiyonlar.php with malicious videoid values using UNION-based injection techniques to extract sensitive database information, including user credentials and other confidential data.

Critical Impact

Unauthenticated attackers can extract sensitive database contents including user credentials, administrative passwords, and potentially compromise the entire web application through SQL injection via the videoid parameter.

Affected Products

• Jettweb PHP Hazir Haber Sitesi Scripti V3

Discovery Timeline

• 2026-03-12 - CVE CVE-2019-25511 published to NVD
• 2026-03-12 - Last updated in NVD database

Technical Details for CVE-2019-25511

Vulnerability Analysis

This SQL injection vulnerability (CWE-89) exists in the fonksiyonlar.php file of the Jettweb PHP Hazir Haber Sitesi Scripti V3 application. The vulnerability stems from improper sanitization of user-supplied input in the videoid GET parameter. When a user submits a request containing the videoid parameter, the application directly incorporates this value into SQL queries without proper validation or parameterization, allowing attackers to inject arbitrary SQL statements.

The network-accessible nature of this vulnerability means remote attackers can exploit it without any prior authentication or user interaction. The UNION-based injection technique enables attackers to append additional SELECT statements to the original query, effectively extracting data from other database tables. This could lead to complete disclosure of database contents, including sensitive user information, administrative credentials, and potentially allow for further system compromise.

Root Cause

The root cause of CVE-2019-25511 is insufficient input validation and the lack of parameterized queries in the fonksiyonlar.php script. The application directly concatenates user-supplied input from the videoid parameter into SQL query strings rather than using prepared statements with bound parameters. This classic SQL injection vulnerability pattern allows attackers to break out of the intended query context and execute arbitrary SQL commands.

Attack Vector

The attack vector is network-based, requiring an attacker to send specially crafted HTTP GET requests to the vulnerable fonksiyonlar.php endpoint. The attacker manipulates the videoid parameter value by appending SQL injection payloads, typically using UNION-based techniques to extract data from the database.

The exploitation flow involves:

1. Identifying the vulnerable endpoint (fonksiyonlar.php)
2. Determining the number of columns in the original query through ORDER BY or UNION SELECT enumeration
3. Crafting a UNION SELECT statement to extract data from target tables
4. Iterating through database tables and columns to exfiltrate sensitive information

Technical details and proof-of-concept information can be found in the Exploit-DB #46599 entry and the VulnCheck Advisory on SQL Injection.

Detection Methods for CVE-2019-25511

Indicators of Compromise

• HTTP GET requests to fonksiyonlar.php containing SQL keywords in the videoid parameter such as UNION, SELECT, FROM, OR, AND, --
• Unusual database query patterns or errors in application logs
• Access log entries showing encoded SQL injection payloads in URL parameters targeting the videoid field
• Unexpected database access patterns or data exfiltration activity

Detection Strategies

• Implement Web Application Firewall (WAF) rules to detect and block SQL injection patterns in the videoid parameter
• Monitor web server access logs for requests containing suspicious SQL syntax targeting fonksiyonlar.php
• Deploy intrusion detection system (IDS) signatures for UNION-based SQL injection attempts
• Enable database query logging and alert on anomalous query patterns or syntax errors

Monitoring Recommendations

• Configure alerting for any requests to fonksiyonlar.php containing URL-encoded SQL operators or keywords
• Monitor database connection logs for unusual query volumes or failed authentication attempts
• Implement rate limiting on the vulnerable endpoint to slow down automated exploitation attempts
• Review web application logs for HTTP 500 errors that may indicate SQL injection probing

How to Mitigate CVE-2019-25511

Immediate Actions Required

• If possible, restrict access to fonksiyonlar.php or disable the video functionality until a patch is applied
• Implement input validation to sanitize the videoid parameter, allowing only numeric values
• Deploy a Web Application Firewall (WAF) with SQL injection protection rules in front of the application
• Consider replacing the vulnerable application with a maintained and security-hardened alternative

Patch Information

No official vendor patch information is available for this vulnerability. The Jettweb PHP Hazir Haber Sitesi Scripti V3 application should be considered unsupported. Organizations using this software should prioritize migrating to a maintained content management system with proper security practices.

For additional technical details and vulnerability information, refer to:

• Exploit-DB #46599
• VulnCheck Advisory on SQL Injection

Workarounds

• Modify the fonksiyonlar.php source code to use prepared statements with parameterized queries for the videoid parameter
• Implement strict input validation to ensure videoid only accepts integer values using functions like intval() or filter_var() with FILTER_VALIDATE_INT
• Use a WAF to block requests containing SQL injection patterns targeting the vulnerable parameter
• Consider disabling or removing the vulnerable video functionality if it is not business-critical

# Example Apache mod_rewrite rule to block SQL injection attempts on videoid parameter
# Add to .htaccess or Apache configuration
RewriteEngine On
RewriteCond %{QUERY_STRING} videoid=.*(['\";]|union|select|from|where|order|--|#) [NC]
RewriteRule .* - [F,L]