CVE-2026-14689: Apartment Visitor Management SQL Injection

CVE-2026-14689 Overview

CVE-2026-14689 is a SQL injection vulnerability in CodeAstro Apartment Visitor Management System 1.0. The flaw resides in the /apartment-visitor/add-apartment.php script, where the apartmentno parameter is passed to a database query without proper sanitization. An authenticated remote attacker can manipulate this parameter to alter the SQL statement executed by the backend. The issue is tracked under CWE-74 (Improper Neutralization of Special Elements in Output Used by a Downstream Component). A public exploit has been referenced in third-party disclosure platforms, increasing the likelihood of opportunistic abuse against exposed instances.

Critical Impact
A low-privileged remote attacker can inject arbitrary SQL through the apartmentno parameter, potentially disclosing or altering apartment and visitor records stored in the backend database.

Affected Products

CodeAstro Apartment Visitor Management System 1.0
Deployments exposing /apartment-visitor/add-apartment.php to authenticated users
Installations using the default database schema shipped with the application

Discovery Timeline

2026-07-05 - CVE-2026-14689 published to the National Vulnerability Database
2026-07-07 - Last updated in the NVD database

Technical Details for CVE-2026-14689

Vulnerability Analysis

The vulnerability is a classic in-band SQL injection in a PHP application. The add-apartment.php handler accepts the apartmentno argument from an HTTP request and concatenates it into a SQL query rather than binding it as a parameter. Because the input is not validated or escaped, an attacker can break out of the intended string context and append SQL clauses of their choice. The vulnerability requires network access and low privileges but no user interaction, and a public proof of concept has been referenced in the GitHub CVE issue discussion and VulDB CVE report.

Root Cause

The root cause is the absence of prepared statements or parameterized queries in the add-apartment.php file. User-controlled data flows directly from the HTTP request into a dynamic SQL string, matching the pattern described by CWE-74. No input validation, type enforcement, or output encoding is applied to the apartmentno field before it reaches the database engine.

Attack Vector

An attacker authenticates to the application with any account permitted to submit apartment records, then issues a crafted request to /apartment-visitor/add-apartment.php with a malicious apartmentno payload. The payload can terminate the intended value and append conditions or UNION clauses that extract data from other tables. Because the attack is delivered over the network and does not require user interaction, it is suitable for automated scanners. Impact is limited to the confidentiality, integrity, and availability of records reachable by the application's database user.

No verified exploitation code is included in this article. Technical details are available in the VulDB vulnerability overview and the GitHub CVE issue discussion.

Detection Methods for CVE-2026-14689

Indicators of Compromise

HTTP POST or GET requests to /apartment-visitor/add-apartment.php containing SQL metacharacters such as single quotes, UNION, SLEEP(, or -- in the apartmentno parameter.
Unexpected database errors or long response times originating from the add-apartment.php endpoint in web server logs.
New or modified rows in apartment and visitor tables that do not correspond to legitimate administrative actions.

Detection Strategies

Deploy web application firewall signatures that flag SQL injection payloads targeting the apartmentno request parameter.
Enable database query logging and alert on queries against apartment tables that contain boolean tautologies, stacked statements, or INFORMATION_SCHEMA references.
Correlate authenticated session identifiers with anomalous POST volume to /apartment-visitor/add-apartment.php to surface automated exploitation attempts.

Monitoring Recommendations

Forward web server, PHP error, and database logs to a centralized analytics platform and retain them long enough to support incident review.
Baseline normal request rates and payload sizes for the add-apartment.php endpoint and alert on deviations.
Monitor outbound traffic from the application server for data exfiltration patterns following any suspected injection activity.

How to Mitigate CVE-2026-14689

Immediate Actions Required

Restrict access to /apartment-visitor/add-apartment.php to trusted networks or a VPN until a fix is applied.
Rotate database credentials used by the application and review the application account's privileges, removing any rights beyond what is required.
Audit apartment and visitor tables for unexpected inserts, updates, or deletions.

Patch Information

No official vendor patch has been referenced in the NVD entry at the time of publication. Administrators should monitor the CodeAstro website and the GitHub CVE issue discussion for updates. Until a fixed release is available, apply the workarounds below and consider removing the affected endpoint from production if it is not business-critical.

Workarounds

Modify add-apartment.php to use parameterized queries via PDO or mysqli prepared statements instead of string concatenation.
Enforce server-side input validation that restricts apartmentno to an allow-listed pattern such as alphanumeric characters of a bounded length.
Place the application behind a web application firewall with SQL injection rulesets enabled and configured in blocking mode.
Run the database user with least-privilege permissions so that a successful injection cannot escalate beyond the application's own tables.

bash

# Example ModSecurity rule to block SQL metacharacters in the apartmentno parameter
SecRule ARGS:apartmentno "@rx (['\"();]|--|\bUNION\b|\bSELECT\b|\bSLEEP\b)" \
  "id:1026014689,phase:2,deny,status:403,log,\
   msg:'CVE-2026-14689 SQLi attempt against add-apartment.php'"