CVE-2019-25515: Jettweb PHP Authentication Bypass Flaw

CVE-2019-25515 Overview

Jettweb PHP Hazir Haber Sitesi Scripti V3 contains a critical SQL Injection vulnerability in the login.php administration panel that enables unauthenticated attackers to bypass authentication and gain administrative access. The vulnerability exists due to improper input validation of the username and password parameters, allowing attackers to inject crafted SQL syntax that manipulates the authentication query logic.

Attackers can exploit this vulnerability by submitting equals signs and 'or' operators as username and password parameters to access the administration panel without valid credentials. This classic SQL injection attack pattern allows complete authentication bypass, granting unauthorized administrative privileges to the attacker.

Critical Impact

Unauthenticated attackers can gain full administrative access to the CMS administration panel by exploiting SQL injection in the login mechanism, potentially leading to complete system compromise.

Affected Products

• Jettweb PHP Hazir Haber Sitesi Scripti V3

Discovery Timeline

• 2026-03-12 - CVE CVE-2019-25515 published to NVD
• 2026-03-12 - Last updated in NVD database

Technical Details for CVE-2019-25515

Vulnerability Analysis

This vulnerability is classified as CWE-89 (SQL Injection) and represents a severe authentication bypass flaw in the Jettweb PHP Hazir Haber Sitesi Scripti V3 content management system. The login.php file processes user-supplied username and password parameters without proper sanitization or parameterized queries, allowing malicious SQL statements to be injected directly into the authentication query.

The attack is network-accessible and requires no authentication or user interaction, making it highly exploitable. When attackers submit specially crafted input containing SQL logical operators, the authentication logic evaluates to true regardless of whether valid credentials are provided, effectively bypassing the login mechanism entirely.

Root Cause

The root cause of this vulnerability is the direct concatenation of user-supplied input into SQL queries without proper sanitization, prepared statements, or parameterized queries. The login.php script fails to validate or escape special characters in the username and password fields before constructing the SQL authentication query. This allows attackers to inject SQL logical operators that alter the intended query logic, causing the authentication check to always return true.

Attack Vector

The attack is conducted remotely over the network by sending a malicious HTTP POST request to the login.php endpoint. The attacker crafts the username and password parameters with SQL injection payloads containing equals signs and 'or' operators. These payloads manipulate the underlying SQL query to bypass the authentication check.

The exploitation process typically involves:

1. Identifying the vulnerable login.php administration panel
2. Crafting SQL injection payloads using logical operators
3. Submitting the malicious request to bypass authentication
4. Gaining unauthorized access to the administrative interface

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

Detection Methods for CVE-2019-25515

Indicators of Compromise

• HTTP POST requests to login.php containing SQL operators such as 'OR', '=', or '1'='1' in username or password fields
• Successful administrative logins from unexpected IP addresses or geographic locations
• Web server access logs showing repeated login attempts with unusual parameter patterns
• Administrative actions performed without corresponding legitimate user sessions

Detection Strategies

• Deploy web application firewalls (WAF) with SQL injection detection rulesets to identify and block malicious login attempts
• Implement log analysis to detect SQL injection patterns in HTTP request parameters targeting authentication endpoints
• Configure intrusion detection systems (IDS) to alert on known SQL injection signatures in web traffic
• Monitor authentication logs for successful logins with anomalous source characteristics

Monitoring Recommendations

• Enable detailed logging for all authentication attempts on the administration panel
• Set up alerts for multiple failed login attempts followed by successful authentication from the same source
• Implement real-time monitoring of administrative account activity for unauthorized changes
• Review web server logs regularly for SQL injection attack patterns targeting login.php

How to Mitigate CVE-2019-25515

Immediate Actions Required

• Restrict access to the login.php administration panel by IP whitelist or VPN requirement
• Deploy a web application firewall (WAF) with SQL injection protection rules in front of the application
• Disable or remove the vulnerable Jettweb PHP Hazir Haber Sitesi Scripti V3 installation until a patch is available
• Audit administrative accounts and sessions for signs of unauthorized access

Patch Information

No vendor patch information is currently available for this vulnerability. The Jettweb PHP Hazir Haber Sitesi Scripti V3 product appears to be legacy software without active maintenance. Organizations using this software should consider migrating to a supported content management system with proper security practices.

For additional technical details, refer to the Exploit-DB #46599 advisory and the VulnCheck Advisory for JettWeb.

Workarounds

• Implement input validation and parameterized queries by modifying the login.php source code to use prepared statements
• Place the administration panel behind HTTP Basic Authentication or additional authentication layer
• Use a reverse proxy or WAF to filter requests containing SQL injection patterns before they reach the application
• Consider migrating to a modern, actively maintained CMS with proper SQL injection protections