CVE-2024-45398Network attack vector

Authenticated code execution via disguised upload extensions

Published Sep 17, 2024 · Updated Sep 18, 2024

Unrestricted file upload in affected Contao releases allows remote authenticated users with file-manager access to execute server code. FileUpload and file-manager rename paths derived the type from only the final filename suffix, allowing a backend user to add or conceal an executable extension. Exploitation requires a backend account permitted to use the file manager and a web server configured to execute PHP or another uploaded script type.

CVSS severity8.3
High
EPSS probability0.53%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Unrestricted file upload in affected Contao releases allows remote authenticated users with file-manager access to execute server code. FileUpload and file-manager rename paths derived the type from only the final filename suffix, allowing a backend user to add or conceal an executable extension. Exploitation requires a backend account permitted to use the file manager and a web server configured to execute PHP or another uploaded script type.

The record

CVE
CVE-2024-45398
Published
Sep 17, 2024
Updated
Sep 18, 2024
Vendor
Contao
Product
Contao
Classifications
CWE-434, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 17, 2024CVE publishedPublication date reported by the CVE source.
  2. Sep 18, 2024Record 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=>=4.0.0, < 4.13.49
  2. Affected versionversion=4.0.0 <=4.13.49
  3. Affected versionversion=>= 5.0.0, < 5.3.15
  4. Affected versionversion=5.0.0 <=5.3.15
  5. Affected versionversion=>= 5.4.0, < 5.4.3
  6. Affected versionversion=5.4.0 <=5.4.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Contao · Contaoversion=>=4.0.0, < 4.13.49; version=4.0.0 <=4.13.49; version=>= 5.0.0, < 5.3.15; version=5.0.0 <=5.3.15; version=>= 5.4.0, < 5.4.3; version=5.4.0 <=5.4.3

Published CVSS scores

8.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
8.3GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L
8.7GitHub Advisory DatabaseCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N

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 IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-434Unrestricted Upload of File with Dangerous Type
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

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

Technologies

Your stack

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Your stack

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