CVE-2026-66462
Deferred Deferred - Pending Action

Unauthenticated Sensitive Data Exposure in WooCommerce Appointments

Publication date: 2026-08-13

Last updated on: 2026-08-13

Assigner: Patchstack

Description
Unauthenticated Sensitive Data Exposure in WooCommerce Appointments <= 5.3.8 versions.

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Meta Information

Published
2026-08-13
Last Modified
2026-08-13
Generated
2026-09-02
AI Q&A
2026-08-13
EPSS Evaluated
2026-09-01
NVD
CVE-2026-66462
EUVD
EUVD-2026-57881

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
woocommerce appointments to 5.3.8 (inc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-497 The product does not properly prevent sensitive system-level information from being accessed by unauthorized actors who do not have the same level of access to the underlying system as the product does.

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Executive Summary

This is an unauthenticated sensitive data exposure vulnerability in WooCommerce Appointments plugin versions 5.3.8 and below. It allows attackers to access sensitive information without authentication.

Detection Guidance

To detect this vulnerability, monitor network traffic for unauthorized access to sensitive data endpoints in WooCommerce Appointments. Check for unusual requests to endpoints handling appointment or user data without authentication. Review server logs for repeated failed access attempts or suspicious IP patterns targeting the plugin's API routes.

Impact Analysis

Attackers could steal sensitive customer or business data stored by the plugin. This may include personal information, appointment details, or other confidential data.

Compliance Impact

This vulnerability exposes sensitive data without authentication, which could lead to unauthorized access to personal or health-related information. Such exposure may violate GDPR if personal data is involved or HIPAA if protected health information is compromised, potentially resulting in legal penalties and reputational damage.

Mitigation Strategies

Update WooCommerce Appointments to the latest version to patch the vulnerability. If updating is not possible, consider disabling the plugin temporarily until an update is applied.

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