CVE-2026-16940Public exploitNetwork attack vector

Unauthenticated file deletion via AJAX path traversal

Published Aug 5, 2026 · Updated Aug 5, 2026

Path traversal in Addify Custom Fields for WooCommerce before 1.5.1 allows remote attackers to delete arbitrary server files. The unauthenticated afcf_file_delete AJAX handler accepts a file_name path and deletes the resolved file without confining it to its upload directory. WooCommerce and the plugin must be active; a valid guest nonce appears on front-end pages, and deleting wp-config.php forces reinstallation that enables site takeover.

CVSS severity10.0
Critical
EPSS probability0.40%
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 Addify Custom Fields for WooCommerce before 1.5.1 allows remote attackers to delete arbitrary server files. The unauthenticated afcf_file_delete AJAX handler accepts a file_name path and deletes the resolved file without confining it to its upload directory. WooCommerce and the plugin must be active; a valid guest nonce appears on front-end pages, and deleting wp-config.php forces reinstallation that enables site takeover.

The record

CVE
CVE-2026-16940
Published
Aug 5, 2026
Updated
Aug 5, 2026
Vendor
Addify
Product
Custom Fields for WooCommerce
Classifications
CWE-22, T1485
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 5, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 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 <1.5.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Addify · Custom Fields for WooCommerceversion=0 <1.5.1

Published CVSS scores

10.0CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/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 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 exploitPublished

Weakness, pattern, technique

CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
T1485Data Destruction

Public exploit references

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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