What’s Vulnerable › Vulnerabilities

CVE-2026-16582: Booking for Appointments and Events Calendar - Amelia <= 2.4.5 - Missing Authorization to Unauthenticated Payment Bypass

• Severity: medium (CVSS 5.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-17 · updated 2026-09-18
• Weakness: CWE-862

Description

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

Affected products

• melograno Booking for Appointments and Events Calendar – Amelia: through 2.4.5

References

• https://plugins.trac.wordpress.org/changeset/3640186
• https://www.wordfence.com/threat-intel/vulnerabilities/id/9e0c6f83-f4ca-4891-b2db-e2ac49d96ee5?source=cve

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