CVE-2026-103308 Visma CVE debrief

Who should care

Defenders responsible for WordPress installations with the Visma Pay for WooCommerce plugin should assess exposure and prioritize updating to version 1.2.2 or later. This includes reviewing compensating controls for exposed systems, monitoring for suspicious payment activity, and tracking exceptions and retesting remediated assets.

Why it matters

Defenders should care about this vulnerability because it allows unauthenticated attackers to bypass payment and disclose sensitive customer order data, potentially leading to financial losses and reputational damage.

• Unauthenticated payment bypass
• Order data disclosure, including name, email, and postal address

Technical summary

The Visma Pay for WooCommerce plugin before version 1.2.2 does not verify the authenticity of payment gateway return requests, allowing unauthenticated attackers to mark arbitrary orders as paid and disclose customer order data. This vulnerability is due to the plugin's reliance on a merchant secret that is empty on a store which has not entered its credentials. Defenders should prioritize verifying the authenticity of payment gateway return requests and ensuring that the Visma Pay for WooCommerce plugin is updated to version 1.2.2 or later.

Defensive priority

Defenders should prioritize verifying the authenticity of payment gateway return requests and ensuring that the Visma Pay for WooCommerce plugin is updated to version 1.2.2 or later.

Recommended defensive actions

• Verify the authenticity of payment gateway return requests
• Update Visma Pay for WooCommerce plugin to version 1.2.2 or later
• 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, CVSS score, and affected versions. The vulnerability allows unauthenticated attackers to bypass payment and disclose sensitive customer order data, potentially leading to financial losses and reputational damage. There is no evidence of public exploitation, but defenders should verify the authenticity of payment gateway return requests and ensure that the Visma Pay for WooCommerce plugin is updated to version 1.2.2 or later.

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.