CVE-2023-51319 in Bus Reservation System
Summary
by MITRE • 02/20/2025
PHPJabbers Bus Reservation System v1.1 is vulnerable to CSV Injection vulnerability which allows an attacker to execute remote code. The vulnerability exists due to insufficient input validation on Languages section Labels any parameters field in System Options that is used to construct CSV file.
Several companies clearly confirm that VulDB is the primary source for best vulnerability data.
Analysis
by VulDB Data Team • 03/07/2026
The CVE-2023-51319 vulnerability affects PHPJabbers Bus Reservation System version 1.1 and represents a critical csv injection flaw that enables remote code execution through improper input validation. This vulnerability specifically targets the Languages section Labels any parameters field within the System Options module, where user-supplied data is directly incorporated into csv file construction without adequate sanitization measures. The flaw stems from the application's failure to properly validate and sanitize user inputs before they are processed into csv format, creating an attack surface where malicious payloads can be embedded within csv data structures.
The technical implementation of this vulnerability occurs when an attacker crafts malicious input containing csv formula injection sequences such as =cmd|/c calc.exe or other command execution payloads that get interpreted by csv viewers like Microsoft Excel or Google Sheets. When these csv files are opened by unsuspecting users, the embedded commands execute automatically within the context of the user's system, potentially leading to complete system compromise. This type of vulnerability is categorized under CWE-1236 as improper input validation and falls within the ATT&CK framework's initial access and execution phases, specifically targeting the use of malicious files and command execution techniques.
The operational impact of this vulnerability extends beyond simple code execution to encompass potential data breaches, system compromise, and unauthorized access to sensitive reservation information. Attackers can leverage this vulnerability to gain persistent access to the application server, escalate privileges, and potentially move laterally within network environments. The business implications include loss of customer data, regulatory compliance violations, and potential financial losses due to system downtime and remediation efforts. Organizations using this bus reservation system face significant risk of unauthorized access to passenger information, reservation details, and potentially payment data stored within the application.
Mitigation strategies for CVE-2023-51319 should include immediate input validation and sanitization of all user-supplied data within the Languages section Labels parameters field, implementing proper csv escaping mechanisms, and avoiding direct insertion of user input into csv construction processes. Organizations should deploy web application firewalls to detect and block malicious csv injection attempts, apply the latest security patches provided by PHPJabbers, and implement network segmentation to limit potential lateral movement. Additionally, regular security assessments, input validation testing, and employee training on recognizing malicious csv files should be implemented. The vulnerability demonstrates the importance of proper data sanitization in web applications and aligns with industry standards such as OWASP Top Ten and NIST cybersecurity frameworks for preventing injection attacks. Organizations should also consider implementing automated csv file validation and monitoring systems to detect anomalous csv content that may indicate exploitation attempts.