CVE-2024-4040Known exploitationPublic exploitNetwork attack vector

Unauthenticated code execution via unsafe template expansion

Published Apr 22, 2024 · Updated Oct 21, 2025

Server-side template injection in CrushFTP before 10.7.1 and 11.1.0 allows unauthenticated remote attackers to read files and execute code. ServerSessionAJAX.writeResponse passes attacker-controlled API response text to an unsafe variable-expansion routine that evaluates template directives, including file inclusion. An anonymous web session can reach the API, exposing files outside the VFS sandbox and enabling administrator-session theft and server compromise.

CVSS severity10.0
Critical
EPSS probability99.54%
Next 30 days · Sep 16, 2026
Known exploitationReported
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Server-side template injection in CrushFTP before 10.7.1 and 11.1.0 allows unauthenticated remote attackers to read files and execute code. ServerSessionAJAX.writeResponse passes attacker-controlled API response text to an unsafe variable-expansion routine that evaluates template directives, including file inclusion. An anonymous web session can reach the API, exposing files outside the VFS sandbox and enabling administrator-session theft and server compromise.

The record

CVE
CVE-2024-4040
Published
Apr 22, 2024
Updated
Oct 21, 2025
Vendor
CrushFTP
Product
CrushFTP
Classifications
CWE-1336, CAPEC-253, CAPEC-115, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 22, 2024CVE publishedPublication date reported by the CVE source.
  2. Oct 21, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=10.0 <10.7.1
  2. Affected versionversion=11.0 <11.1.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

CrushFTP · CrushFTPversion=10.0 <10.7.1; version=11.0 <11.1.0

Published CVSS scores

9.8DirectCyber CNACVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
10.0NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsShadowserver observations through Sep 16, 2026. Gaps indicate unavailable data.
Sep 10, 2026Sep 16, 2026
View daily counts
Reporting dayUnique IPs
Sep 10, 2026Unavailable
Sep 11, 2026Unavailable
Sep 12, 2026Unavailable
Sep 13, 2026Unavailable
Sep 14, 20261
Sep 15, 2026Unavailable
Sep 16, 2026Unavailable
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationReported
Public exploitPublished

Weakness, pattern, technique

CWE-1336Improper Neutralization of Special Elements Used in a Template Engine
CAPEC-253Remote Code Inclusion
CAPEC-115Authentication Bypass
T1190Exploit Public-Facing Application

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Reported exploitation

Technologies

Your stack

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Your stack

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