Description

A flaw has been found in code-projects Doctor Appointment System 1.0. This issue affects some unknown processing of the file /contactus.php. This manipulation of the argument firstname causes sql injection. Remote exploitation of the attack is possible. The exploit has been published and may be used.

Executive Summary

Technical Details

Mitigations

References

Additional Metadata

{
  "score": "7.3",
  "pubDate": "2026-09-04T04:18:08.163Z",
  "pubdate": "2026-09-04T04:18:08.163Z",
  "executiveSummary": "A critical SQL injection vulnerability has been identified in the Doctor Appointment System 1.0. The vulnerability resides within the processing logic of the /contactus.php file, specifically targeting the 'firstname' argument.\nThis flaw allows a remote, unauthenticated attacker to manipulate SQL queries by injecting malicious SQL statements into the input field. Successful exploitation grants the attacker the ability to interact directly with the underlying database, potentially leading to unauthorized data disclosure, modification, or deletion.\nGiven that the exploit is publicly available, this vulnerability poses a significant risk to the integrity, confidentiality, and availability of the application's data. Immediate remediation is required to prevent unauthorized database access.",
  "technicalDetails": "The vulnerability is a classic SQL injection (SQLi) flaw occurring in the /contactus.php file of the Doctor Appointment System 1.0. The root cause is the improper neutralization of special elements used in an SQL command within the 'firstname' input parameter before it is passed to the database query.\nThe application fails to employ parameterized queries (prepared statements) or sufficient input sanitization when handling the 'firstname' argument. Consequently, an attacker can supply crafted input containing SQL meta-characters (such as single quotes, semicolons, or comment operators) to break out of the intended data context and append arbitrary SQL commands.\nThe attack flow proceeds as follows: 1. The attacker identifies the /contactus.php endpoint as the target interface. 2. The attacker submits a specially crafted HTTP request (typically POST) where the 'firstname' parameter contains malicious SQL syntax. 3. The backend application concatenates this unsanitized input directly into a raw SQL query string executed against the database management system (DBMS). 4. The DBMS interprets the attacker's injected SQL commands as part of the intended query, executing them with the privileges of the database user configured for the application.\nAs this flaw is exposed via /contactus.php, it does not require prior authentication, meaning it is accessible to any remote user with network access to the web server. Depending on the backend database configuration and the privileges of the web application user, the post-exploitation impact can be severe. Attackers may perform UNION-based attacks to exfiltrate database records, execute blind SQL injection to infer data byte-by-byte, or, in misconfigured environments, leverage database-specific features to gain further access to the underlying operating system or escalate privileges.\nBecause the exploit code for this vulnerability has been publicly published, the barrier to entry for exploitation is low, significantly increasing the probability of successful exploitation by opportunistic threat actors."
}