CVE-2026-103300 Eurobank CVE debrief

Who should care

Defenders responsible for WordPress installations using the Eurobank WooCommerce Payment Gateway plugin should assess exposure and prioritize verification and remediation efforts to prevent exploitation. This includes verifying payment-confirmation request authenticity, updating the plugin to a version that fixes this issue, and monitoring for suspicious payment activity.

Why it matters

CVE-2026-103300 allows unauthenticated attackers to manipulate order status, potentially leading to financial losses and reputational damage. Defenders should prioritize verification and remediation efforts to prevent exploitation.

• Defenders must verify payment-confirmation request authenticity to prevent order payment forgery.
• Defenders should update the plugin to a version that fixes this issue to prevent exploitation.
• Defenders must monitor for suspicious payment activity to detect potential attacks.

Technical summary

The Eurobank WooCommerce Payment Gateway plugin through version 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. This allows unauthenticated attackers to mark any pending order as paid, and to force any order into a failed status without any secret at all. The vulnerability affects WordPress installations using this plugin, potentially leading to financial losses and reputational damage. Defenders should prioritize verifying the authenticity of payment-confirmation requests and updating the plugin to a version that fixes this issue.

Defensive priority

Defenders should prioritize verifying the authenticity of payment-confirmation requests and updating the plugin to a version that fixes this issue.

Recommended defensive actions

• Verify the authenticity of payment-confirmation requests
• Update the Eurobank WooCommerce Payment Gateway plugin to a version that fixes this issue
• Monitor for suspicious payment activity
• Review compensating controls for exposed systems while remediation is scheduled and verified
• Check relevant monitoring, detection, and logs for exposed assets that need extra review
• Track exceptions, retest remediated assets, and close the item only after evidence is documented
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up

Evidence notes

The CVE record and source item provide details on the vulnerability, including its description and affected versions. The Eurobank WooCommerce Payment Gateway plugin through version 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. This allows unauthenticated attackers to mark any pending order as paid, and to force any order into a failed status without any secret at all. The source item provides additional

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.