CVE-2026-107750 wpovernight CVE debrief

Who should care

Defenders responsible for WordPress installations with the PDF Invoices & Packing Slips for WooCommerce plugin should assess exposure and prioritize verification of input sanitization and output escaping measures.

Why it matters

The PDF Invoices & Packing Slips for WooCommerce plugin for WordPress is vulnerable to Stored Cross-Site Scripting, allowing unauthenticated attackers to inject arbitrary web scripts.

• Defenders must verify exposure of WooCommerce plugin versions up to 5.16.4
• Defenders must assess the effectiveness of current input sanitization and output escaping measures
• Successful exploitation could lead to arbitrary web script injection

Technical summary

The PDF Invoices & Packing Slips for WooCommerce plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'billing_address.first_name / last_name / company, customer_note' parameter in all versions up to, and including, 5.16.4 due to insufficient input sanitization and output escaping. This vulnerability allows unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. The vulnerability is caused by insufficient input sanitization and output escaping in the 'billing_address.first_name / last_name / company, customer_note' parameter.

Defensive priority

Defenders should prioritize verifying exposure of WooCommerce plugin versions up to 5.16.4 and assess the effectiveness of current input sanitization and output escaping measures.

Recommended defensive actions

• Verify WooCommerce plugin versions up to 5.16.4 for exposure
• Assess the effectiveness of current input sanitization and output escaping measures
• Implement additional security measures to prevent Stored Cross-Site Scripting attacks
• 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 NVD entry provide details on the vulnerability, including its description, CVSS score, and affected versions. The vulnerability is caused by insufficient input sanitization and output escaping in the 'billing_address.first_name / last_name / company, customer_note' parameter. The CVE record was published on 2026-10-31T07:16:33.920Z and has not been modified since then. The NVD entry provides additional information on the vulnerability, including its CVSS score and affected versions.

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.