CVE-2025-6842: Product Inventory System SQLi Vulnerability

CVE-2025-6842 Overview

CVE-2025-6842 is a SQL injection vulnerability in code-projects Product Inventory System 1.0. The flaw resides in the /admin/edit_user.php script, where the ID parameter is concatenated into a SQL query without proper sanitization. An authenticated attacker with high privileges can manipulate this parameter to inject arbitrary SQL statements. The exploit can be triggered remotely over the network, and a proof of concept has been published. The vulnerability maps to [CWE-89] (SQL Injection) and [CWE-74] (Improper Neutralization of Special Elements in Output).

Critical Impact
Authenticated attackers can inject SQL into the edit_user.php endpoint to read, modify, or destroy administrative records in the inventory database.

Affected Products

Fabian Product Inventory System 1.0
code-projects Product Inventory System (vendor distribution)
Deployments exposing /admin/edit_user.php to untrusted networks

Discovery Timeline

2025-06-29 - CVE-2025-6842 published to NVD
2026-04-29 - Last updated in NVD database

Technical Details for CVE-2025-6842

Vulnerability Analysis

The vulnerability exists in the administrative user-editing workflow of Product Inventory System 1.0. The edit_user.php script accepts an ID parameter from the request and embeds it directly into a SQL statement that retrieves or updates user records. Because the parameter is not validated, escaped, or bound through a prepared statement, attacker-controlled input becomes part of the executed query.

The issue requires an authenticated session with administrative privileges, which limits the practical exploitation pool. EPSS scoring places the probability of exploitation at 0.186% (percentile 40.2), and the CVE is not listed in the CISA Known Exploited Vulnerabilities catalog. A public proof of concept is available through GitHub PoC Issue #12.

Root Cause

The root cause is direct concatenation of user-supplied input into a SQL query string inside /admin/edit_user.php. The application does not use parameterized queries or input filtering, so SQL metacharacters such as single quotes, comments, and UNION keywords are passed through to the database engine.

Attack Vector

An authenticated attacker sends a crafted HTTP request to /admin/edit_user.php with a malicious ID parameter. The injected payload can append UNION SELECT statements to extract data from other tables, use boolean or time-based techniques to enumerate schema, or modify records to escalate privileges within the application.

No verified exploit code is reproduced here. Technical details and a working request can be found in the VulDB entry #314285 and the GitHub PoC Issue #12.

Detection Methods for CVE-2025-6842

Indicators of Compromise

HTTP requests to /admin/edit_user.php containing SQL metacharacters such as ', --, /*, UNION, SLEEP(, or BENCHMARK( in the ID parameter
Web server access logs showing unusually long or URL-encoded values for the ID query string
Unexpected modifications to user records, role flags, or password hashes in the inventory database
Database error messages referencing edit_user.php in PHP error logs

Detection Strategies

Inspect web application firewall logs for SQL injection signatures targeting the edit_user.php endpoint
Correlate administrative authentication events with subsequent anomalous query patterns to flag misuse of privileged accounts
Enable MySQL or MariaDB general query logging temporarily to identify queries containing concatenated ID values

Monitoring Recommendations

Alert on bursts of 4xx or 5xx responses from /admin/edit_user.php that indicate injection probing
Monitor outbound database traffic for unexpected information_schema queries originating from the web application user
Track changes to the users table, including role escalations and password resets performed outside of normal admin workflows

How to Mitigate CVE-2025-6842

Immediate Actions Required

Restrict access to /admin/ paths to trusted management networks using IP allowlists or VPN
Rotate administrator credentials and review audit logs for unauthorized edits to user accounts
Deploy a web application firewall rule that blocks SQL metacharacters in the ID parameter of edit_user.php

Patch Information

No official vendor patch has been published for Product Inventory System 1.0 at the time of writing. Operators should track the code-projects resource hub for updates and apply source-level fixes that replace string concatenation with parameterized queries using PDO or mysqli prepared statements. Additional context is available in VulDB CTI #314285.

Workarounds

Modify edit_user.php locally to cast $_GET['ID'] to an integer with intval() before use in the query
Replace inline SQL with prepared statements binding the ID parameter as an integer type
Disable the affected administrative module if it is not required in production
Place the application behind an authenticated reverse proxy to limit exposure of admin endpoints

bash

# Example hardening: enforce integer casting and prepared statements
# Replace vulnerable code in /admin/edit_user.php
# Before:  $id = $_GET['ID']; $sql = "SELECT * FROM users WHERE id=$id";
# After:
$id = (int) ($_GET['ID'] ?? 0);
$stmt = $mysqli->prepare("SELECT * FROM users WHERE id = ?");
$stmt->bind_param("i", $id);
$stmt->execute();