CVE-2026-4347Network attack vector

Unauthenticated arbitrary file move via path traversal

Published Apr 2, 2026 · Updated Apr 2, 2026

Path traversal in Takashi Kitajima's MW WP Form 5.1.0 and earlier allows remote attackers to move arbitrary server files. The generate_user_filepath and move_temp_file_to_upload_dir functions accept an insufficiently validated path and relocate the referenced file outside the intended upload directory. Exploitation requires a form with a file-upload field and database inquiry saving enabled; moving a sensitive file such as wp-config.php grants site takeover and code execution.

CVSS severity8.1
High
EPSS probability1.27%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Path traversal in Takashi Kitajima's MW WP Form 5.1.0 and earlier allows remote attackers to move arbitrary server files. The generate_user_filepath and move_temp_file_to_upload_dir functions accept an insufficiently validated path and relocate the referenced file outside the intended upload directory. Exploitation requires a form with a file-upload field and database inquiry saving enabled; moving a sensitive file such as wp-config.php grants site takeover and code execution.

The record

CVE
CVE-2026-4347
Published
Apr 2, 2026
Updated
Apr 2, 2026
Vendor
Takashi Kitajima
Product
MW WP Form
Classifications
CWE-22
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 2, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 2, 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 <=5.1.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Takashi Kitajima · MW WP Formversion=0 <=5.1.0

Published CVSS scores

8.1WordfenceCVSS:3.1/AV:N/AC:H/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.

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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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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