Summaryinfo

A vulnerability identified as problematic has been detected in SourceCodester Sales and Inventory System 1.0. This impacts an unknown function of the file add_sales.php of the component Parameter Handler. The manipulation of the argument msg leads to cross site scripting. This vulnerability is traded as CVE-2026-30559. It is possible to initiate the attack remotely. There is no exploit available.

Detailsinfo

A vulnerability was found in SourceCodester Sales and Inventory System 1.0 and classified as problematic. This issue affects some unknown functionality of the file add_sales.php of the component Parameter Handler. The manipulation of the argument msg with an unknown input leads to a cross site scripting vulnerability. Using CWE to declare the problem leads to CWE-79. The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. Impacted is integrity. The summary by CVE is:

A Reflected Cross-Site Scripting (XSS) vulnerability exists in SourceCodester Sales and Inventory System 1.0. The vulnerability is located in the add_sales.php file via the "msg" parameter. The application fails to sanitize the input, allowing remote attackers to inject arbitrary web script or HTML via a crafted URL.

The advisory is shared at github.com. The identification of this vulnerability is CVE-2026-30559 since 03/04/2026. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. It demands that the victim is doing some kind of user interaction. Technical details are known, but no exploit is available. MITRE ATT&CK project uses the attack technique T1059.007 for this issue.

By approaching the search of inurl:add_sales.php it is possible to find vulnerable targets with Google Hacking.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Vendor

• SourceCodester

Name

• Sales and Inventory System

Version

• 1.0

License

• free

Website

• Vendor: https://www.sourcecodester.com/

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