CVE-2023-34738Network attack vector

Unauthenticated arbitrary file upload

Published Jun 28, 2023 · Updated Nov 27, 2024

Unrestricted file upload in Chemex 3.7.1 and earlier allows remote attackers to place arbitrary files on the server via network requests. The published CVE record and its unavailable upstream issue do not identify the upload endpoint or the validation operation that accepts dangerous file types. No authentication or user interaction is required; unauthorized file placement is established, while executable placement and code execution remain unconfirmed.

CVSS severity9.8
Critical
EPSS probability0.78%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

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Summary

What happened

Unrestricted file upload in Chemex 3.7.1 and earlier allows remote attackers to place arbitrary files on the server via network requests. The published CVE record and its unavailable upstream issue do not identify the upload endpoint or the validation operation that accepts dangerous file types. No authentication or user interaction is required; unauthorized file placement is established, while executable placement and code execution remain unconfirmed.

The record

CVE
CVE-2023-34738
Published
Jun 28, 2023
Updated
Nov 27, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-434
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 28, 2023CVE publishedPublication date reported by the CVE source.
  2. Nov 27, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-434Unrestricted Upload of File with Dangerous Type

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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