CVE-2026-109522 in Online-Appointment-Booking-System
Summary
by MITRE • 10/13/2026
A vulnerability has been found in girishsaraf Online-Appointment-Booking-System up to f427b4757128ca253d33d0cc4e87bbb9c999a4d5. Affected is an unknown function of the file Admin/deleteclinic.php of the component Admin CRUD Endpoint. The manipulation of the argument cid/did leads to sql injection. Remote exploitation of the attack is possible. The exploit has been disclosed to the public and may be used. This product follows a rolling release approach for continuous delivery, so version details for affected or updated releases are not provided. The project was informed of the problem early through an issue report but has not responded yet.
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Analysis
by VulDB Data Team • 10/16/2026
The Online Appointment Booking System developed by Girish Saraf contains a critical security flaw within its administrative interface that allows for remote code execution via database manipulation. Specifically, the vulnerability resides in the Admin CRUD Endpoint located at the file path Admin/deleteclinic.php. This component is responsible for handling requests to remove clinic records from the system's backend database. The root cause of this weakness lies in how the application processes input parameters associated with the deletion operation, particularly those identified as cid or did. These arguments are passed directly into SQL queries without adequate sanitization or parameterization, creating a classic injection vector that attackers can exploit to interfere with the intended database operations.
This flaw is categorized under CWE-89, which defines Improper Neutralization of Special Elements used in an SQL Command, commonly known as SQL Injection. The technical mechanism involves the application constructing dynamic SQL statements using unsanitized user-supplied data from the cid or did arguments. Because these inputs are not validated against a whitelist nor escaped properly before being incorporated into the query string, an attacker can inject malicious SQL syntax. This allows for unauthorized access to sensitive database contents, modification of existing records, or deletion of critical system data. The severity is compounded by the fact that this specific endpoint is part of the administrative module, which typically requires higher privilege levels but may be exposed to unauthenticated users if authentication controls are weak or bypassed.
The operational impact of exploiting this vulnerability extends beyond simple data theft. An attacker with remote network access can leverage SQL injection techniques such as UNION-based attacks or blind boolean/time-based injections to extract sensitive information including user credentials, personal health information, and appointment schedules stored in the database. Furthermore, depending on the underlying Database Management System configuration, successful exploitation could potentially lead to command execution on the host server if certain extensions like xp_cmdshell are enabled in Microsoft SQL Server or similar functions exist in other databases. This represents a significant risk to data integrity and confidentiality, violating core principles of information security regarding access control and data protection.
From a threat intelligence perspective, this vulnerability aligns with MITRE ATT&CK technique T1059, Command and Scripting Interpreter, specifically when SQL injection is used as a vector for executing commands or exfiltrating data through out-of-band channels. The fact that the exploit has been disclosed to the public significantly increases the risk landscape, as automated scanning tools and malicious actors can readily utilize known proof-of-concept code to identify and compromise vulnerable instances. Since the project follows a rolling release model with continuous delivery, there is no fixed version number to patch against, making it difficult for administrators to determine if their deployment includes the fix unless they track specific commit hashes or update frequently from the source repository.
Mitigation strategies must focus on immediate remediation of the codebase and broader security hardening practices. The primary corrective action involves refactoring the Admin/deleteclinic.php file to use prepared statements with parameterized queries for all database interactions involving user-supplied input. This ensures that data is treated strictly as data rather than executable code, effectively neutralizing injection attempts. Additionally, implementing strict input validation on the cid and did parameters can provide an additional layer of defense by rejecting any input that does not match expected formats, such as integer values only. Access controls should also be reviewed to ensure that administrative endpoints are protected by robust authentication mechanisms and role-based access control policies to limit exposure to authorized personnel only. Regular security audits and static application security testing (SAST) scans should be integrated into the development pipeline to catch similar issues before deployment in future rolling releases.