CVE-2026-1305Network attack vector

Unauthenticated order manipulation via omitted webhook signature

Published Feb 27, 2026 · Updated Feb 27, 2026

Improper authentication in Japanized for WooCommerce 2.8.4 and earlier allows remote attackers to alter order status through its Paidy webhook. When the x-paidy-signature header is absent, paidy_webhook_permission_check returns true instead of rejecting the request. No account or user interaction is required; a crafted POST can mark an unpaid order as Processing or Completed, misrepresenting its payment state.

CVSS severity5.3
Medium
EPSS probability0.41%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper authentication in Japanized for WooCommerce 2.8.4 and earlier allows remote attackers to alter order status through its Paidy webhook. When the x-paidy-signature header is absent, paidy_webhook_permission_check returns true instead of rejecting the request. No account or user interaction is required; a crafted POST can mark an unpaid order as Processing or Completed, misrepresenting its payment state.

The record

CVE
CVE-2026-1305
Published
Feb 27, 2026
Updated
Feb 27, 2026
Vendor
Artisan Workshop
Product
Japanized for WooCommerce
Classifications
CWE-287, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 27, 2026CVE publishedPublication date reported by the CVE source.
  2. Feb 27, 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=* <=2.8.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Artisan Workshop · Japanized for WooCommerceversion=* <=2.8.4

Published CVSS scores

5.3WordfenceCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

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-287Improper Authentication
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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