CVE-2026-68500 Sylius CVE debrief

Who should care

Sylius application administrators, security teams, and developers integrating with Mollie payment gateway should be aware of this vulnerability and take necessary actions to mitigate the risk. This includes verifying the Sylius Mollie Plugin version, applying patches, and reviewing Sylius application integrations with Mollie payment. Additionally, implementing compensating controls such as monitoring for suspicious payment webhook activity and logging payment status updates can help prevent potential exploitation attempts. Retesting and validating patch application is also crucial to ensure the vulnerability is properly addressed. Furthermore, organizations should review their inventory and apply the patches to prevent potential unauthorized modifications to order payment statuses. Exception tracking and logging payment status updates can also help in identifying potential security incidents. Overall, a thorough review of the Sylius application and its integrations with Mollie payment gateway is necessary to ensure the security of the system. It is also essential to verify the integrity of orders and payments to prevent potential financial losses. By taking these steps, organizations can minimize the risk associated with this vulnerability and protect their systems from potential exploitation attempts. The CVSS score of 7.5 and HIGH severity of this vulnerability emphasizes the importance of prompt action to address this issue. Therefore, it is crucial for Sylius application administrators, security teams, and developers to prioritize this vulnerability and take necessary actions to mitigate the risk. This may involve coordinating with the Sylius community, reviewing the codebase, and applying patches or workarounds to prevent exploitation. By doing so, organizations can ensure the security and integrity of their Sylius applications and prevent potential security incidents. The vulnerability highlights the importance of secure payment processing and the need for robust security measures to prevent unauthorized modifications to order payment statuses. In summary, Sylius application administrators, security teams, and developers integrating with Mollie payment, as

Technical summary

The Sylius Mollie Plugin's POST /{_locale}/update-payment payment webhook does not verify that the Mollie payment belongs to the referenced Sylius order. This allows an unauthenticated attacker with any valid paid Mollie payment ID to mark a victim order as paid without transferring funds for that order. The vulnerability affects Sylius Mollie Plugin versions prior to 2.2.8, 3.2.4, and 3.3.1. To address this issue, it is recommended to apply patches to fix the vulnerability and implement compensating controls to monitor for suspicious payment webhook activity.

Defensive priority

Organizations using Sylius Mollie Plugin should verify their inventory and apply the patches to prevent potential unauthorized modifications to order payment statuses.

Recommended defensive actions

• Verify Sylius Mollie Plugin version and apply patches (2.2.8, 3.2.4, or 3.3.1) to fix the vulnerability
• Inventory check: review Sylius application integrations with Mollie payment
• Implement compensating controls: monitor for suspicious payment webhook activity
• Exception tracking: log and review payment status updates
• Retest: validate patch application and monitor for potential exploitation attempts

Evidence notes

The CVE-2026-68500 issue arises from the Sylius Mollie Plugin's POST /{_locale}/update-payment payment webhook not verifying that the Mollie payment belongs to the referenced Sylius order, allowing an unauthenticated attacker with any valid paid Mollie payment ID to mark a victim order as paid without transferring funds for that order.

Official resources