CVE-2026-16582

MediumCVSS 5.3

Published: 17/09/2026(UTC)Updated: 18/09/2026(UTC)Translated: 18/09/2026(UTC)NVD NIST

Exploitation Probability (EPSS)

Low risk

0.23%

14th percentile - higher than 14% of all known CVEs

Summary

The Booking for Appointments and Events Calendar – Amelia plugin for WordPress is vulnerable to unauthorized modification of data in all versions up to, and including, 2.4.5. This is due to the plugin accepting a client-supplied package-redemption identifier as proof of payment without validating it. This makes it possible for unauthenticated attackers to create approved appointment bookings without completing payment.

Risk Assessment

The vulnerability allows attackers to obtain approved bookings without paying, leading to financial losses and abuse of the booking system.

Recommendation

It is recommended to update the Amelia plugin to the latest version that includes the fix. Also, implement server-side validation of package redemption identifiers.

Other vulnerabilities in Booking for Appointments and Events Calendar – Amelia

CVE-2026-14311Medium
The Booking for Appointments and Events Calendar – Amelia plugin for WordPress is vulnerable to unauthorized access and modification of data due to a missing ownership verification on /users/customers/<id> endpoint in all versions up to, and including, 2.4.4. This makes it possible for authenticated attackers, with wpamelia-provider role, to view and modify arbitrary customers, including password reset. Takeover of WordPress user accounts, with the roles up to Editor, is also possible if that user had made an Amelia booking. This vulnerability affects only the Premium version of the plugin, where the Employee Panel is present.

Original NVD description (English source)

Vulnerability data from NVD (NIST) · CISA KEV · EPSS