CVE-2023-6559Network attack vector

Unauthenticated file deletion via unsanitized attachment paths

Published Dec 16, 2023 · Updated Apr 8, 2026

Path traversal in MW WP Form 5.0.3 and earlier allows remote attackers to delete arbitrary server files through public form submissions. The attachment cleanup accepts unsanitized filenames from POST data and deletes their resolved paths without restricting them to uploaded attachments. Exploitation requires Confirm and Submit with inquiry-data saving disabled; deleting wp-config.php resets the site for takeover.

CVSS severity9.8
Critical
EPSS probability1.31%
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 MW WP Form 5.0.3 and earlier allows remote attackers to delete arbitrary server files through public form submissions. The attachment cleanup accepts unsanitized filenames from POST data and deletes their resolved paths without restricting them to uploaded attachments. Exploitation requires Confirm and Submit with inquiry-data saving disabled; deleting wp-config.php resets the site for takeover.

The record

CVE
CVE-2023-6559
Published
Dec 16, 2023
Updated
Apr 8, 2026
Vendor
株式会社Webの相談所
Product
MW WP Form
Classifications
CWE-22, T1485
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 16, 2023CVE 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 <=5.0.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

株式会社Webの相談所 · MW WP Formversion=0 <=5.0.3

Published CVSS scores

7.5WordfenceCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
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-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
T1485Data Destruction

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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