Executive Summary

[{'type': 'paragraph', 'content': 'CVE-2026-3792 is a SQL injection vulnerability found in SourceCodester Sales and Inventory System version 1.0, specifically in the file purchase_invoice.php. The vulnerability arises from improper sanitization of the GET parameter "purchaseid", allowing an attacker to inject malicious SQL commands.'}, {'type': 'paragraph', 'content': 'This flaw enables attackers to manipulate SQL queries executed by the application, potentially compromising the confidentiality, integrity, and availability of the system. The vulnerability can be exploited remotely and requires authentication.'}, {'type': 'paragraph', 'content': 'The injection supports multiple techniques including UNION-based queries, Boolean-based blind injection, and time-based blind injection, allowing attackers to retrieve sensitive database information and enumerate database schema.'}] [1, 2, 3]

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Impact Analysis

Exploitation of this vulnerability can lead to unauthorized access to sensitive data stored in the backend database, including potentially confidential business or customer information.

Attackers can retrieve, modify, or delete data by injecting arbitrary SQL commands, which compromises data integrity and availability.

The vulnerability can also be used to enumerate database structure, increasing the risk of further attacks.

Since the exploit is publicly available and can be performed remotely, the risk of attack is significant, especially if the system is exposed to the internet.

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Compliance Impact

I don't know

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Detection Guidance

[{'type': 'paragraph', 'content': 'This vulnerability can be detected by testing the purchase_invoice.php endpoint with crafted SQL injection payloads targeting the purchaseid GET parameter.'}, {'type': 'paragraph', 'content': 'One effective method is to use sqlmap, an automated SQL injection tool, to scan and confirm the vulnerability.'}, {'type': 'list_item', 'content': 'Example sqlmap command: sqlmap -u "http://127.0.0.1:8089/purchase_invoice.php?purchaseid=PR3" --batch -v 6 --risk=3 --cookie "PHPSESSID=YOUR_COOKIE_HERE"'}, {'type': 'paragraph', 'content': 'Additionally, attackers or testers can use manual payloads such as UNION-based, boolean-based blind, or time-based blind SQL injection strings in the purchaseid parameter to verify the vulnerability.'}, {'type': 'list_item', 'content': "UNION-based payload example: purchaseid=PR3' UNION ALL SELECT NULL,NULL,NULL,CONCAT(0x7162787171,0x68595375656a48764e49416542676f73764647584277616849704858684e4e76494e4a71726f6357,0x71786b6a71),NULL,...-- -"}, {'type': 'list_item', 'content': "Boolean-based blind payload example: purchaseid=PR3' AND 8776=8776 AND 'AuSo'='AuSo"}, {'type': 'list_item', 'content': "Time-based blind payload example: purchaseid=PR3' AND (SELECT 9448 FROM (SELECT(SLEEP(5)))wjTm) AND 'yFph'='yFph"}, {'type': 'paragraph', 'content': 'Google dorking can also help identify vulnerable targets by searching for URLs containing purchase_invoice.php, e.g., using the query: inurl:purchase_invoice.php'}] [1, 2]

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Mitigation Strategies

No known countermeasures or mitigations have been documented for this vulnerability.

It is suggested to replace the affected component or product with an alternative that does not contain this vulnerability.

As an immediate step, restrict access to the vulnerable purchase_invoice.php endpoint and monitor for suspicious activity.

Implementing web application firewall (WAF) rules to detect and block SQL injection attempts targeting the purchaseid parameter may help reduce risk temporarily.

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