CVE-2024-8242Network attack vector

Authenticated server file write via unchecked profile upload

Published Sep 13, 2024 · Updated Apr 8, 2026

Arbitrary file upload in FluxBuilder MStore API 4.15.3 and earlier allows remote authenticated users to write non-PHP files to the server. The update_user_profile() path stores profile uploads without first validating their file type in the affected releases. Subscriber access is sufficient, and public registration can supply an account; PHP uploads remain blocked, so code execution requires a separate chain.

CVSS severity4.3
Medium
EPSS probability0.78%
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 FluxBuilder MStore API 4.15.3 and earlier allows remote authenticated users to write non-PHP files to the server. The update_user_profile() path stores profile uploads without first validating their file type in the affected releases. Subscriber access is sufficient, and public registration can supply an account; PHP uploads remain blocked, so code execution requires a separate chain.

The record

CVE
CVE-2024-8242
Published
Sep 13, 2024
Updated
Apr 8, 2026
Vendor
FluxBuilder
Product
MStore API
Classifications
CWE-434, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 13, 2024CVE publishedPublication date reported by the CVE source.
  2. Apr 8, 2026Record 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=0 <=4.15.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

FluxBuilder · MStore APIversion=0 <=4.15.3

Published CVSS scores

4.3WordfenceCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A: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.

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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 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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