CVE-2024-31351Network attack vector

Unauthenticated arbitrary file upload

Published May 17, 2024 · Updated Apr 28, 2026

Unrestricted file upload in Copymatic – AI Content Writer & Generator 1.6 and earlier allows remote attackers to write arbitrary files to the server. Published records do not identify the upload handler or disclose which validation step fails before attacker-controlled content is stored. The attack requires no authentication or user interaction; a server that executes the uploaded file can run its code under the web server account.

CVSS severity10.0
Critical
EPSS probability1.62%
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 Copymatic – AI Content Writer & Generator 1.6 and earlier allows remote attackers to write arbitrary files to the server. Published records do not identify the upload handler or disclose which validation step fails before attacker-controlled content is stored. The attack requires no authentication or user interaction; a server that executes the uploaded file can run its code under the web server account.

The record

CVE
CVE-2024-31351
Published
May 17, 2024
Updated
Apr 28, 2026
Vendor
Copymatic
Product
Copymatic
Classifications
CWE-434, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 17, 2024CVE publishedPublication date reported by the CVE source.
  2. Apr 28, 2026Record 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=0 <=1.6
  2. Affected versionversion=n/a <=1.6 changes=[{"at":"1.7","status":"unaffected"}]

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Copymatic · Copymaticversion=0 <=1.6; version=n/a <=1.6 changes=[{"at":"1.7","status":"unaffected"}]

Published CVSS scores

10.0PatchstackCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
9.8NVDCVSS: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
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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