Japanized for WooCommerce <= 2.8.4 - Missing Authorization to Unauthenticated Paidy Order Manipulation
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- None · Low · None
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-287.
Summary
The Japanized for WooCommerce plugin for WordPress is vulnerable to Improper Authentication in versions up to, and including, 2.8.4. This is due to a flawed permission check in the `paidy_webhook_permission_check` function that unconditionally returns `true` when the webhook signature header is omitted. This makes it possible for unauthenticated attackers to bypass payment verification and fraudulently mark orders as "Processing" or "Completed" without actual payment via a crafted POST request to the Paidy webhook endpoint.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| shoheitanaka | Japanized for WooCommerce | up to 2.8.4 | — | No fix listed | CNA |
- Japanized for WooCommerce Vendorshoheitanaka Affected up to 2.8.4 Fixed in — No fix listed CNA
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2026-1305
- 2026-10-03 Alias added: GHSA-rm76-fcj7-6cxh
References
Other 6
- https://www.wordfence.com/threat-intel/vulnerabilities/id/8cef4b2b-ae8d-4e18-b763-6960a0b944f7?source=cve
- https://plugins.trac.wordpress.org/browser/woocommerce-for-japan/trunk/includes/gateways/paidy/class-wc-paidy-endpoint.php#L63
- https://plugins.trac.wordpress.org/browser/woocommerce-for-japan/trunk/includes/gateways/paidy/class-wc-paidy-endpoint.php#L108
- https://plugins.trac.wordpress.org/browser/woocommerce-for-japan/tags/2.8.2/includes/gateways/paidy/class-wc-paidy-endpoint.php#L108
- https://plugins.trac.wordpress.org/browser/woocommerce-for-japan/tags/2.8.2/includes/gateways/paidy/class-wc-paidy-endpoint.php#L63
- https://plugins.trac.wordpress.org/changeset/3464868/woocommerce-for-japan/trunk/includes/gateways/paidy/class-wc-paidy-endpoint.php
More shoheitanaka vulnerabilities
- TI-2023-25835 WordPress Japanized For WooCommerce plugin <= 2.6.4 - Multiple Broken Access Control vulnerability CVSS 3.1HIGH 8.6
- TI-2026-41277 WordPress Japanized For WooCommerce plugin <= 2.9.12 - Broken Access Control vulnerability CVSS 3.1MEDIUM 6.5
- TI-2025-13577 Japanized for WooCommerce <= 2.7.17 - Missing Authorization to Unauthenticated Order Status Modification CVSS 3.1MEDIUM 5.3
- TI-2025-12864 PAYGENT for WooCommerce <= 2.4.6 - Missing Authorization to Unauthenticated Payment Callback Manipulation CVSS 3.1MEDIUM 5.3
- TI-2025-30610 WordPress Japanized For WooCommerce plugin <= 2.6.40 - Cross Site Request Forgery (CSRF) Vulnerability CVSS 3.1MEDIUM 5.4
Sources
- CVE-2026-1305 · CVE Program
- CVE-2026-1305 · NVD
- FIRST EPSS
- GHSA-rm76-fcj7-6cxh · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences