CVE-2026-104926 ThemeHigh CVE debrief

Who should care

Defenders responsible for WordPress installations with the WooCommerce Extra Product Options Pro plugin should assess exposure and prioritize verification and potential updates. This includes reviewing compensating controls for exposed systems while remediation is scheduled and verified, and tracking exceptions, retesting remediated assets, and closing the item only after evidence is documented.

Why it matters

Defenders should care about CVE-2026-104926 because it allows unauthenticated attackers to inject arbitrary web scripts in pages that execute if they can successfully trick a user into performing an action such as clicking on a link. The vulnerability is only exploitable on product pages where a Date & Time Range Picker extra field is configured. Defenders responsible for WordPress installations with the WooCommerce Extra Product Options Pro plugin should assess exposure and prioritize verification and potential updates.

• Unauthenticated attackers may inject arbitrary web scripts in pages that execute if they can successfully trick a user into performing an action such as clicking on a link.
• The vulnerability is only exploitable on product pages where a Date & Time Range Picker extra field is configured.

Technical summary

The WooCommerce Extra Product Options Pro plugin for WordPress is vulnerable to Reflected Cross-Site Scripting via the '<fieldname>_start / <fieldname>_end' parameter in all versions up to, and including, 3.3.2 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that execute if they can successfully trick a user into performing an action such as clicking on a link.

Defensive priority

Defenders should prioritize verifying and updating the plugin to a patched version, if available, and monitor for potential exploitation attempts.

Recommended defensive actions

• Verify and update the WooCommerce Extra Product Options Pro plugin to a patched version, if available.
• Monitor for potential exploitation attempts on product pages where a Date & Time Range Picker extra field is configured.
• Review and adjust input sanitization and output escaping for the plugin's fields.
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up.
• Review the supplied official advisory or CVE record to validate affected scope, severity, and vendor guidance.
• Plan vendor-supported updates or mitigations through normal change control where exposure is confirmed.
• Check relevant monitoring, detection, and logs for exposed assets that need extra review.

Evidence notes

The vulnerability is described in the CVE record and NVD vulnerability detail page. The required field name is visible in the product page source and requires no prior knowledge to discover. The CVE record was published on 2026-10-31T10:16:36.273Z and has not been modified since then. The official CVE Program record and NVD detail page provide source-provided CVE metadata and source-specific vulnerability assessment. Additional verification is recommended to confirm affected scope, severity, and vendor guidance.

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.