CVE-2026-103423 masaakitanaka CVE debrief

Who should care

Defenders responsible for WordPress installations using the Booking Package plugin should assess exposure and prioritize verification and remediation efforts. This includes reviewing the plugin version, restricting access to sensitive information, and monitoring for potential exploitation attempts. Additionally, defenders should verify the presence of this vulnerability in their WordPress installations and update to a fixed version if necessary.

Why it matters

The Booking Package plugin for WordPress has a vulnerability that allows unauthenticated attackers to retrieve sensitive information about booked customers. Defenders should prioritize verifying the presence of this vulnerability in their WordPress installations and updating to a fixed version if necessary.

• Unauthenticated attackers can retrieve sensitive information about booked customers.
• Personally identifiable information, including names, email addresses, phone numbers, physical addresses, and cancellation tokens, may be exposed.
• Defenders should verify the presence of this vulnerability in their WordPress installations and update to a fixed version if necessary.
• Remediation priority is high due to the potential for sensitive information disclosure.

Technical summary

The Booking Package plugin for WordPress is vulnerable to authorization bypass in all versions up to, and including, 1.7.29. This is due to the plugin not properly verifying that a user is authorized to perform an action. This makes it possible for unauthenticated attackers to retrieve personally identifiable information for every booked customer stored in the booking_package_booked_customers table.

Defensive priority

Defenders should prioritize verifying the presence of this vulnerability in their WordPress installations and updating to a fixed version if necessary.

Recommended defensive actions

• Verify the version of the Booking Package plugin in use and update to a fixed version if necessary.
• Review and restrict access to sensitive information stored in the booking_package_booked_customers table.
• Monitor for potential exploitation attempts targeting this vulnerability.
• 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 about the vulnerability, including its existence in all versions up to and including 1.7.29 of the Booking Package plugin and the potential for unauthenticated attackers to retrieve sensitive information.

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.