How serious is CVE-2026-1305?

This vulnerability has a CVSS score of 5.3 out of 10, classified as MEDIUM severity. Proof-of-concept exploit code is publicly available, making this an active threat.

Is there exploit code available for CVE-2026-1305?

Yes, proof-of-concept exploit code for CVE-2026-1305 is publicly available on GitHub and security research platforms. This increases the risk of active exploitation.

Which products are affected by CVE-2026-1305?

Check the official CVE details for a complete list of affected products and versions.

How do I fix CVE-2026-1305?

To remediate CVE-2026-1305, check for security patches from the vendor. Apply all available updates and security patches. If no patch is available, implement recommended workarounds or security controls to mitigate the risk.

CVE-2026-1305

Medium

|5.3

Exploit Available

Plain English Summary

AI-powered analysis for quick understanding

An attacker can exploit this vulnerability to falsely mark orders as "Processing" or "Completed" without making any actual payments, allowing them to commit fraud. This can happen if they send a specially crafted request to the payment system's webhook, and it affects versions of the Japanized for WooCommerce plugin up to 2.8.4.

Technical Description

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.

CVSS Vector Analysis

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

Confidentiality ImpactNone

Integrity ImpactLow

Availability ImpactNone

ScopeUnchanged

Vector String

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

Exploit Resources

Search for proof-of-concept code and exploit modules

GitHub Search Exploit-DB Nuclei Templates Metasploit Vulners

Official References

NIST NVD

Est. Bounty

$724($500-$1K)

Vendor Response

Grade APatched in 0 days

Quick Information

Published

Feb 27, 2026

about 1 month ago

Last Modified

Feb 27, 2026

about 1 month ago