# CVE-2026-90695: SourceCodester Inventory Management System stored XSS in Vendor Management

Source: https://junglewise.ai/threats/cve-2026-90695-sourcecodester-inventory-management-system-stored-xss-in-vendor  
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-2026-90695 · Severity: low · CVSS 3.5 · Published 2026-09-14

SourceCodester Inventory Management System is a web-based application used to manage product inventory and vendor information. A stored cross-site scripting (XSS) vulnerability in the Vendor Management module allows authenticated attackers to inject malicious JavaScript into vendor records, which then executes in the browsers of any user who views the vendor list—including administrators. This can lead to session hijacking, account takeover, and unauthorized access to sensitive inventory 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-2026-90695 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-90695 being exploited in the wild.

**How severe is CVE-2026-90695?** 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-2026-90695?** 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-2026-90695 attacked?** It is attacked over the network, in a web application.

**Am I affected by CVE-2026-90695?** 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 vulnerability is a stored cross-site scripting (CWE-79) flaw in the /api/vendors_handler.php and /vendors.php components. The Vendor Management module fails to sanitize or validate user input in vendor fields (name, mobile, email, address, PAN, GST) before storing them in the database or rendering them in the HTML response. An authenticated attacker can inject JavaScript payloads via the vendor creation endpoint; the malicious script is persisted in the database and executed whenever any authenticated user views the vendor list page. The attack requires authentication but enables session cookie theft and account takeover of any user, including administrators. Input validation and output encoding via htmlspecialchars() or similar functions are required to fix this issue.

## Affected products

- SourceCodester Inventory Management System 1.0

## Timeline

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

## References

- [https://gist.github.com/fhewm98/5eaa9df770357351917f4538a3032eb7](https://gist.github.com/fhewm98/5eaa9df770357351917f4538a3032eb7)
- [https://vuldb.com/cve/CVE-2026-90695](https://vuldb.com/cve/CVE-2026-90695)

## 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 customer name](https://junglewise.ai/threats/cve-2026-90694-sourcecodester-inventory-management-system-stored-xss-in-customer)
- [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)