CVE-2026-103304 eaSYNC CVE debrief

Who should care

Defenders responsible for WordPress installations with the eaSYNC Booking plugin should assess exposure and prioritize updates to prevent unauthorized access. This includes reviewing and restricting access to cancellation-related AJAX actions, monitoring for unauthorized cancellation requests and email template updates, and verifying plugin versions. Security teams should also track exceptions, retest remediated assets, and close the item only after证据 is文档

Why it matters

The CVE-2026-103304 vulnerability in the eaSYNC Booking plugin allows unauthenticated users to create cancellation requests and update email templates. Defenders should prioritize updates to prevent unauthorized access and verify plugin versions.

• Potential for unauthorized cancellation requests
• Possible email template updates by unauthorized users
• Need for verification of plugin version and vulnerability status
• Potential impact on booking notification emails

Technical summary

The eaSYNC Booking WordPress plugin before 1.3.31 does not perform authorization or nonce checks on several of its cancellation-related AJAX actions. This allows unauthenticated users to create booking cancellation requests, trigger booking notification emails, and overwrite the content of the emails the site sends. The vulnerability affects WordPress installations with the eaSYNC Booking plugin, and defenders should prioritize updates to prevent unauthorized access. Additional information on potential exploits or affected systems is limited.

Defensive priority

Defenders should prioritize updating the eaSYNC Booking plugin to version 1.3.31 or later to prevent unauthorized cancellation requests and email template updates.

Recommended defensive actions

• Update the eaSYNC Booking plugin to version 1.3.31 or later
• Review and restrict access to cancellation-related AJAX actions
• Monitor for unauthorized cancellation requests and email template updates
• 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 CVE record and source item provide details on the vulnerability, including its impact on the eaSYNC Booking plugin. However, additional information on potential exploits or affected systems is limited.

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.