Vulnerability report

Exploitation attempts observed in the wild Confirmed confidence In CISA KEV

CVE-2024-23692

Rejetto HTTP File Server 2.3m Unauthenticated RCE

Rejetto / HTTP File Server · 0 to <= 2.3m

Watch CVE-2024-23692 Browse KEV feed
Severity
CVSS 9.8 · Critical
Confidence
Confirmed
Exploit status
Exploitation attempts observed in the wild
EPSS
99.5%
First observed
—
Last observed
—

Decision summary

What security teams need to know first

Direct answers before the deeper technical record.

What it is

CVE-2024-23692 is an unauthenticated Rejetto HTTP File Server 2.3m Unauthenticated RCE.

Have exploitation attempts been observed?

Yes. Exploitation attempts have been reported for this vulnerability. Previdian lists it as a known exploited vulnerability. Listed in CISA KEV. Also reported by third-party sources. Confidence is confirmed.

Who is affected?

Rejetto / HTTP File Server 0 to <= 2.3m.

What should we do?

Prioritize remediation. Validate affected assets and apply vendor fixes on an accelerated timeline.

Overview

Rejetto HTTP File Server, up to and including version 2.3m, is vulnerable to a template injection vulnerability

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.

rejetto Affected
http_file_server
Through 2.3m
Rejetto Affected
HTTP File Server
Through 2.3m
View vendor advisory (opens in new tab)
Published
31 May 2024
Exploitation Attempts Reported
09 Jul 2024
Attack vector
Remote
Complexity
Low
Privileges
None
User interaction
None

Tags

metasploit nuclei_scanner cisa nessus_scanner metasploit_scanner

CVE References

Exploitation evidence

Evidence of exploitation attempts

Third-party attestation and first-party sensor observation are shown separately so teams can judge the evidence chain.

Exploitation attempts observed in the wild

CISA

Recorded 09 Jul 2024

A trusted third party reported exploitation attempts.

Proof of concept available

GitHub

Recorded 11 Jun 2024

Public scanner or PoC coverage increases practical exploitability.

Known exploited vulnerability sources

Per-source evidence links for KEV attestations are available through the Previdian Pro API.

Learn about Pro API access
Source Added
CISA First 2024-07-09 00:00 UTC
CVE 2026-06-23 16:40 UTC
The Shadowserver 2026-07-08 00:00 UTC
The Hacker News 2026-10-05 08:31 UTC

Detection

Operational artifacts and observed signals

Make the evidence actionable in scanner, SOC, and edge-control workflows.

Observed signals

Request targets
User-Agents
Callback hosts
0
0
0

Request targets and User-Agents available in Pro. Callback host details available in Enterprise.

Virtual patch status

No Previdian virtual patch is currently available. Future rules ship for ModSecurity, Cloudflare, and AWS WAF.

Learn about virtual patches →

Scanner Artifacts

Scanner and exploit-framework references linked to this CVE.

Scanner Reference Detected
Metasploit https://github.com/rapid7/metasploit-framework/blob/master/modules/exploits/windows/http/rejetto_hfs_rce_cve_2024_23692.rb 28 Apr 2025
Nuclei https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2024/CVE-2024-23692.yaml 25 Apr 2025
Nessus https://www.tenable.com/plugins/nessus/211465 15 Nov 2024

Risk and context

Severity, weaknesses, and research context

CVSS v3.1

9.8 Critical

Potential damage if exploited. Separate from whether attackers are using it.

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

EPSS

99.5%

Estimated chance of exploitation in the next 30 days. Previdian's warning comes from evidence, not this score.

Weaknesses

Improper Neutralization of Special Elements Used in a Template Engine CWE-1336 Improper Control of Generation of Code ('Code Injection') CWE-94

Recent mention · The Hacker News

Attackers Target Rejetto HFS Flaw That Enables Admin Session Forgery and RCE

Ravie LakshmananOct 05, 2026Vulnerability / Web Security A critical security flaw impacting Rejetto HTTP File Server (HFS) is witnessing active exploitation attempts, according to VulnCheck. The vulnerability in question is CVE-2026-61500 (CVSS score: 9.3), a case of session...

Read full advisory

All Mentions

Recent mention · The Hacker News

Attackers Target Rejetto HFS Flaw That Enables Admin Session Forgery and RCE

The Hacker News · 05 Oct 2026

Ravie LakshmananOct 05, 2026Vulnerability / Web Security A critical security flaw impacting Rejetto HTTP File Server (HFS) is witnessing active exploitation attempts, according to VulnCheck. The vulnerability in question is CVE-2026-61500 (CVSS score: 9.3), a case of session forgery stemming from the use of a weak pseudo-random number generator (PRNG) that can lead to a predictable key, which an attacker can then use to gain unauthorized access and seize control of affected systems. "Rejetto HFS 3.0.0 through 3.2.0 derives its session-cookie signing key from the non-cryptographic...

Recent mention · Horizon3.ai Attack Research

Horizon3’s Tales from the Trenches: Anthropic’s Mythos and Rejetto HFS

Horizon3.ai Attack Research · 30 Sep 2026

Horizon3 researchers used Anthropic’s Mythos to uncover a chain of cryptographic weaknesses in Rejetto HFS, recover a predictable signing key, forge an admin session, and achieve remote code execution.

Potential Proof of Concepts

These PoCs are unverified and could contain malware. Use at your own risk.

Rejetto HTTP File Server - Template injection

nuclei · Created Unknown

rejetto_hfs_rce_cve_2024_23692

metasploit · Created Unknown

Metasploit module for CVE-2024-23692

Timeline

From disclosure to observed exploitation attempts

  1. 08:31 UTC

    KEV confirmed by The Hacker News

    Exploitation attempts reported by an external source

  2. 00:00 UTC

    KEV confirmed by The Shadowserver

    Exploitation attempts reported by an external source

  3. 16:40 UTC

    KEV confirmed by CVE

    Exploitation attempts reported by an external source

  4. 15:02 UTC

    Metasploit module available

    Exploit module available

  5. 15:02 UTC

    Public PoC available

    Public proof-of-concept code published

  6. 00:00 UTC

    Nuclei template available

    Scanner coverage available

  7. 21:33 UTC

    Nessus plugin available

    Scanner coverage available

  8. 00:00 UTC

    Added to CISA KEV

    Listed in the CISA Known Exploited Vulnerabilities catalog

  9. 09:36 UTC

    CVE published

    Vulnerability disclosed publicly

  10. 17:35 UTC

    CVE ID reserved

    Identifier reserved by the CNA

Pro API

Automate this intelligence

Confidence, exploit status, sensor telemetry, PoCs, scanner integrations, mentions, and tags are available programmatically for VM, SOC, and CTI workflows.

Start 14-day Pro trial Read API docs
  • Evidence confidence and provenance
  • First-party sensor telemetry
  • PoC and scanner references
  • Affected versions and enrichment
  • Automation-ready JSON delivery

GET /api/v2/pro/kevs/CVE-2024-23692

Sample API response 
{
  "cve_id": "CVE-2024-23692",
  "confidence": "Confirmed",
  "cvss_score": 9.8,
  "cvss_estimated": false,
  "epss_score": 0.99485,
  "exploit_status": {
    "exploited_in_the_wild": true,
    "active_exploitation_observed": false
  },
  "sensor_telemetry": { "attempts": 0, "sensors": 0 }
}