# CVE-2026-90694: SourceCodester Inventory Management System stored XSS in customer name

Source: https://junglewise.ai/threats/cve-2026-90694-sourcecodester-inventory-management-system-stored-xss-in-customer  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-09-14. Updated: 2026-09-26  
License: CC BY 4.0 with a link back

CVE-2026-90694 · Severity: low · CVSS 3.5 · Published 2026-09-14

SourceCodester Inventory Management System is a web-based product inventory and customer management application. An authenticated attacker can inject malicious JavaScript into customer name fields, which is stored in the database and executed whenever any user views the customer list page. This enables session hijacking, account takeover, and unauthorized access to sensitive business data.

Technologies: [SourceCodester Inventory Management System](https://junglewise.ai/threats/technologies/inventory-management-system). Vendors: [SourceCodester](https://junglewise.ai/threats/vendors/sourcecodester).

## Quick answers

**Is CVE-2026-90694 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-90694 being exploited in the wild.

**How severe is CVE-2026-90694?** Low severity, with a CVSS score of 3.5, published 14 September 2026.

**Which products and versions are affected?** SourceCodester Inventory Management System 1.0.

**Is there a fix for CVE-2026-90694?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-90694 attacked?** It is attacked over the network, in a web application.

**Am I affected by CVE-2026-90694?** Check whether you run SourceCodester Inventory Management System at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

The application fails to sanitize or encode the Customer_Name parameter before storing it in the database or rendering it on the customer list page (/customers.php and /api/customers_handler.php). An authenticated user can submit a POST request with injected JavaScript in the Customer_Name field, which is stored directly in the database. When the customer list is rendered, the stored script executes in the victim's browser without escaping, allowing session cookie theft and account takeover. Authentication is required, but any valid account can exploit this vulnerability. The recommended fix involves using htmlspecialchars() for output encoding, server-side input validation, and Content Security Policy headers.

## Affected products

- SourceCodester Inventory Management System 1.0

## Timeline

- 2026-08-05: disclosed
- 2026-09-14: advisory

## References

- [https://gist.github.com/fhewm98/46580c8919d2144e2e5e7598e54df868](https://gist.github.com/fhewm98/46580c8919d2144e2e5e7598e54df868)
- [https://vuldb.com/cve/CVE-2026-90694](https://vuldb.com/cve/CVE-2026-90694)

## Related threats

- [SourceCodester Inventory Management System IDOR in invoice.php](https://junglewise.ai/threats/cve-2026-90697-sourcecodester-inventory-management-system-idor-in-invoice-php)
- [SourceCodester Inventory Management System stored XSS in product name](https://junglewise.ai/threats/cve-2026-90696-sourcecodester-inventory-management-system-stored-xss-in-product)
- [SourceCodester Inventory Management System stored XSS in Vendor Management](https://junglewise.ai/threats/cve-2026-90695-sourcecodester-inventory-management-system-stored-xss-in-vendor)
- [SourceCodester Inventory Management System XSS in User Registration Endpoint](https://junglewise.ai/threats/cve-2026-13570-sourcecodester-inventory-management-system-xss-in-user)
- [SourceCodester Inventory Management System improper access control in users_handler.php](https://junglewise.ai/threats/cve-2026-13568-sourcecodester-inventory-management-system-improper-access)