CVE-2024-36774Public exploitNetwork attack vector

Authenticated code execution via incomplete upload blacklist

Published Jun 6, 2024 · Updated Feb 13, 2025

Arbitrary file upload in Monstra CMS 3.0.4 allows remote authenticated users to execute PHP code through the Files Manager. The Files Manager upload handler rejects only a fixed extension blacklist, then moves every other file into the web-accessible public/uploads tree. A valid backend session and CSRF token are required, and execution follows when the web server treats an accepted PHP-family extension as PHP.

CVSS severity8.0
High
EPSS probability0.72%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Arbitrary file upload in Monstra CMS 3.0.4 allows remote authenticated users to execute PHP code through the Files Manager. The Files Manager upload handler rejects only a fixed extension blacklist, then moves every other file into the web-accessible public/uploads tree. A valid backend session and CSRF token are required, and execution follows when the web server treats an accepted PHP-family extension as PHP.

The record

CVE
CVE-2024-36774
Published
Jun 6, 2024
Updated
Feb 13, 2025
Vendor
Monstra
Product
Monstra CMS
Classifications
CWE-434, T1505.003
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 6, 2024CVE publishedPublication date reported by the CVE source.
  2. Feb 13, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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

  1. Affected versionversion=3.0.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Monstra · Monstra CMSversion=3.0.4

Published CVSS scores

8.0CISA-ADPCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
7.2NIST NVDCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/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 IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-434Unrestricted Upload of File with Dangerous Type
T1505.003Server Software Component: Web Shell

Public exploit references

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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