dbcve.org
Actively exploited in the wild. This CVE is on the CISA Known Exploited Vulnerabilities list — treat remediation as urgent. Federal remediation due by 30 Jul 2024. Known ransomware use
Http File ServerApplication · Rejetto

CVE-2024-23692

CRITICAL · 9.8 CVSS v3.1 Published 2024-05-31
Fix available
A fix is available. Upgrade to after 2.4 or later.
See remediation →
100/100
Remediation priority · Urgent
In the wild Ransomware High EPSS Public exploit Remotely reachable No privileges Zero-click Patch available

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
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.

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis · moderate confidence

Rejetto HTTP File Server (HFS) up to version 2.3m contains a template injection vulnerability that allows remote, unauthenticated attackers to execute arbitrary system commands via specially crafted HTTP requests. This critical flaw stems from improper handling of user-supplied input within the application's template engine, enabling complete compromise of the affected system.

MitigationUpgrade to a supported version of Rejetto HFS if available; if no supported version exists, discontinue use of this software and migrate to an alternative file server solution. As an interim control, restrict network access to the HFS service to trusted IP addresses only.

Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.

Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.

NVD · CPE data
Http File ServerApplication
Affected:<= 2.4

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.

dbcve checks

Work through these to decide whether this CVE applies to you.

  1. Identify if Rejetto HTTP File Server is running
    Check running processes for 'hfs.exe' or scan for listening ports (default: 80, 443, 8080) using 'netstat -ano | findstr LISTENING'
    Affected if HFS.exe process is found or HFS-related ports are listening
  2. Locate the HFS executable and verify its version
    Find the executable file (typically in C:\Program Files\HFS or installation directory), right-click the file, select Properties, and check the 'File version' or 'Product version' field under the Details tab
    Affected if The reported version is 2.3m or any version up to and including 2.4
  3. Check version via web interface if accessible
    Open a browser to the server's IP:port and look for version information in the footer of the main page, or check the HTTP Server header via 'curl -I http://target:port'
    Affected if Version displayed is 2.3m or any version up to and including 2.4
  4. Confirm the template feature is in use
    Verify the HFS web interface is accessible and serving pages - templates are required for normal HFS operation, so if the web interface works, templates are active
    Affected if The HFS web interface loads successfully, indicating templates are enabled and the vulnerability is reachable

The system is affected if Rejetto HTTP File Server version 2.3m or 2.4 is running with the web interface accessible, enabling unauthenticated remote attackers to execute commands via template injection.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

dbcve · scoped
Upgrade available Upgrade to a release after 2.4
Vendor patch github.com →
Interim mitigation

Upgrade to a supported version of Rejetto HFS if available; if no supported version exists, discontinue use of this software and migrate to an alternative file server solution. As an interim control, restrict network access to the HFS service to trusted IP addresses only.

Recommended fix Moderate confidence

Rejetto HFS version 2.4 or later

  1. 1. Back up your current HFS configuration and any hosted files.
  2. 2. Download the latest version of Rejetto HTTP File Server (version 2.4 or later) from the official repository at github.com/rejetto/hfs
  3. 3. Stop the currently running HFS service.
  4. 4. Install or replace the existing HFS installation with the new version.
  5. 5. Restore your backed-up configuration if needed.
  6. 6. Start the HFS service and verify it is functioning correctly.
  7. 7. Test that the vulnerability is patched by confirming the template injection is no longer exploitable.
Caveat Upgrading to a newer major version may introduce UI or feature changes; review release notes before upgrading

Generated from the published advisory — verify against the referenced sources before acting.

Fix this in Http File Server Exploited in the wild — priority engagement
  • Consultation4.0 h
  • Implementation8.0 h
  • Testing6.0 h
  • Review / QA4.0 h
22.0 hours of engineering $3,860
Get it fixed fast

An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $6,176.

Scan for this in your stack

Free · runs locally
dbcve dependency scanner

Check whether your project pulls in CVE-2024-23692 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.

Get it on GitHub Scan in the browser

References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2024-23692 in production — separate from our analysis above.

No notes yet

Be the first to add a field note for this CVE — a mitigation you’ve verified, a version caveat, or a link to a working fix. Sign in above to contribute.

What this is

A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.

What belongs here
  • Verified mitigations, workarounds, and config changes
  • Version or environment caveats, and links to real fixes
  • No weaponised exploit code, or anything meant to cause harm
  • No spam, self-promotion, credentials, or personal data