CVE-2025-9417: Apartment Management System SQLi Flaw

CVE-2025-9417 Overview

CVE-2025-9417 is a SQL injection vulnerability in itsourcecode Apartment Management System version 1.0. The flaw resides in /employee/addemployee.php, where the ID parameter is passed to a database query without proper sanitization. An attacker can manipulate the ID argument to inject arbitrary SQL statements. The attack is remotely exploitable and requires low-level authenticated privileges. Public disclosure of the exploit technique has occurred through VulDB and a GitHub issue tracker, increasing the risk of opportunistic abuse against exposed installations.

Critical Impact

Authenticated remote attackers can inject SQL through the ID parameter in addemployee.php, potentially exposing or modifying database records in the Apartment Management System.

Affected Products

• Admerc Apartment Management System 1.0
• itsourcecode Apartment Management System (distribution)
• The vulnerable endpoint /employee/addemployee.php

Discovery Timeline

• 2025-08-25 - CVE-2025-9417 published to NVD
• 2026-06-17 - Last updated in NVD database

Technical Details for CVE-2025-9417

Vulnerability Analysis

The vulnerability is classified under [CWE-74] (Improper Neutralization of Special Elements in Output Used by a Downstream Component) and manifests as a SQL injection flaw. The /employee/addemployee.php script accepts an ID parameter from user-controlled input and concatenates it directly into a SQL query. Without parameterized statements or input validation, the database engine interprets attacker-supplied SQL syntax as part of the original query. The attack vector is network-based, requires low privileges, and does not require user interaction. The EPSS probability is approximately 0.408%, placing it in the 32nd percentile for likelihood of exploitation.

Root Cause

The root cause is direct interpolation of the ID request parameter into a SQL statement within addemployee.php. The application does not apply prepared statements, parameter binding, or input filtering before executing the query. Standard PHP database APIs such as PDO or mysqli with bound parameters would prevent this class of issue, but the affected code relies on string concatenation.

Attack Vector

An authenticated user submits a crafted value for the ID parameter to the employee management endpoint. The injected payload modifies the WHERE clause or appends additional SQL statements, enabling data extraction through UNION-based queries, boolean-based blind techniques, or time-based inference. Because the endpoint is part of the employee workflow, attackers with low-level access can pivot to read or modify records outside their intended scope.

No verified proof-of-concept code is reproduced here. Refer to the GitHub Issue Discussion and VulDB #321260 Details for technical write-ups.

Detection Methods for CVE-2025-9417

Indicators of Compromise

• HTTP requests to /employee/addemployee.php containing SQL metacharacters such as ', --, UNION, SLEEP(, or OR 1=1 in the ID parameter.
• Unusual database error messages or response time anomalies tied to requests targeting the employee module.
• Authentication logs showing low-privilege accounts repeatedly accessing employee administration endpoints.

Detection Strategies

• Deploy web application firewall (WAF) rules that inspect the ID parameter on addemployee.php for SQL syntax patterns.
• Enable database query logging and alert on queries originating from the employee module that contain UNION, subqueries, or sleep functions.
• Correlate web server access logs with database audit logs to identify requests producing abnormal query volumes or row counts.

Monitoring Recommendations

• Monitor for outbound data transfers from the database host that correlate with HTTP requests to the vulnerable endpoint.
• Track failed and successful query patterns through database activity monitoring (DAM) tools.
• Alert on any modifications to the employee table performed outside of standard administrative workflows.

How to Mitigate CVE-2025-9417

Immediate Actions Required

• Restrict network access to the Apartment Management System to trusted networks or VPN users only.
• Disable or restrict the /employee/addemployee.php endpoint until the vendor releases a patch.
• Audit recent database activity for unauthorized reads or modifications of employee records.
• Rotate database credentials and application session tokens if compromise is suspected.

Patch Information

No official vendor patch is currently listed in the public references for CVE-2025-9417. Administrators should monitor itsourcecode for updated releases and consult VulDB #321260 Incident for advisory tracking. In the absence of an upstream fix, operators must apply code-level mitigations directly.

Workarounds

• Modify addemployee.php to use parameterized queries via PDO or mysqli prepared statements instead of string concatenation.
• Apply server-side input validation that enforces a strict integer type on the ID parameter using intval() or filter_var($id, FILTER_VALIDATE_INT).
• Deploy WAF signatures that block SQL injection payloads targeting the employee module.
• Enforce least-privilege database accounts so the web application cannot execute administrative SQL statements.

# Example WAF rule to block SQL metacharacters on the vulnerable endpoint (ModSecurity)
SecRule REQUEST_URI "@beginsWith /employee/addemployee.php" \
  "chain,deny,status:403,id:1009417,msg:'Possible SQLi on addemployee.php ID parameter'"
  SecRule ARGS:ID "@rx (?i)(union\s+select|sleep\(|--|';|or\s+1=1)" "t:none,t:urlDecodeUni"