CVE-2025-4463: Gym Management System SQL Injection Flaw

CVE-2025-4463 Overview

CVE-2025-4463 is a SQL injection vulnerability in itsourcecode Gym Management System 1.0. The flaw resides in the /ajax.php?action=save_package endpoint, where the ID parameter is passed to a database query without proper sanitization. Remote attackers can manipulate the parameter to inject arbitrary SQL statements. No authentication is required, and the exploit details have been disclosed publicly. The vulnerability is classified under [CWE-74] (Improper Neutralization of Special Elements in Output Used by a Downstream Component).

Critical Impact
Unauthenticated remote attackers can inject SQL statements through the ID parameter, potentially exposing or modifying gym member data, credentials, and package records stored in the backend database.

Affected Products

itsourcecode Gym Management System 1.0
Component: /ajax.php (action save_package)
Vendor identifier: admerc

Discovery Timeline

2025-05-09 - CVE-2025-4463 published to the National Vulnerability Database (NVD)
2025-12-22 - Last updated in NVD database

Technical Details for CVE-2025-4463

Vulnerability Analysis

The vulnerability affects the package management workflow in Gym Management System 1.0. When a request is sent to /ajax.php?action=save_package, the application accepts an ID argument and incorporates it into a SQL statement without parameterized queries or input validation. An attacker can supply crafted SQL syntax through this parameter and break out of the intended query context.

Because the endpoint is reachable over the network and requires no authentication, exploitation can be automated. The disclosed proof of concept demonstrates that the attack can be launched remotely with low complexity.

Successful exploitation yields limited but meaningful impact on confidentiality, integrity, and availability of the application database. Attackers can read or alter records, enumerate schemas, and in some configurations escalate to authentication bypass or further data tampering.

Root Cause

The root cause is improper neutralization of user-supplied input passed to a downstream SQL interpreter. The ID parameter from the HTTP request is concatenated into a query string rather than bound through a prepared statement. This pattern is consistent throughout legacy PHP applications that use direct mysqli_query or similar calls.

Attack Vector

The attack vector is network-based. An attacker sends a crafted HTTP request to the vulnerable save_package action with malicious SQL payloads in the ID parameter. Standard SQL injection techniques, including UNION-based extraction and boolean-based blind enumeration, are applicable. See the GitHub issue describing the vulnerability and the VulDB #308082 details for additional technical context.

Detection Methods for CVE-2025-4463

Indicators of Compromise

HTTP requests to /ajax.php?action=save_package containing SQL metacharacters such as single quotes, UNION SELECT, OR 1=1, or comment sequences -- and # in the ID parameter.
Unusual database error messages logged by the web server or PHP error log originating from the save_package handler.
Outbound traffic or large response payloads from the application server following requests to the vulnerable endpoint.

Detection Strategies

Inspect web access logs for requests to ajax.php where the action parameter equals save_package and the ID parameter contains non-numeric characters.
Deploy web application firewall (WAF) rules that flag SQL injection patterns targeting the save_package action.
Correlate failed database queries with corresponding HTTP requests to identify probing activity.

Monitoring Recommendations

Monitor the application database for unexpected schema queries against information_schema, mysql.user, or other metadata tables.
Alert on bursts of requests to a single AJAX endpoint from one source address, a common pattern for automated SQL injection tooling.
Capture and retain full HTTP request bodies for the /ajax.php endpoint to support incident investigation.

How to Mitigate CVE-2025-4463

Immediate Actions Required

Restrict network access to the Gym Management System administrative interface using firewall rules or VPN gating until a patched build is available.
Apply WAF signatures that block SQL injection payloads on /ajax.php parameters, particularly ID.
Audit the application database for unauthorized changes to package, user, and membership tables.
Rotate database credentials used by the application if compromise is suspected.

Patch Information

No official vendor patch has been published at the time of writing. Operators tracking remediation should monitor the itsourcecode project page and the VulDB threat report for updates. Until a vendor fix is released, source-level remediation requires replacing string concatenation in the save_package handler with parameterized queries using mysqli prepared statements or PDO bound parameters.

Workarounds

Add server-side input validation that rejects non-integer values for the ID parameter before it reaches database code.
Run the application database account with least privilege so that injection cannot reach administrative tables or execute file operations.
Place the application behind an authenticating reverse proxy to remove unauthenticated network exposure.

bash

# Example ModSecurity rule blocking SQLi attempts on the vulnerable endpoint
SecRule REQUEST_URI "@contains /ajax.php" \
  "chain,phase:2,deny,status:403,id:1004463,msg:'CVE-2025-4463 SQLi attempt'"
  SecRule ARGS:action "@streq save_package" \
    "chain"
    SecRule ARGS:ID "@rx [^0-9]" "t:none"