TI-2026-13834 Aliases CVE-2026-16582 GHSA-29vh-pvp9-x94x

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

LOW 30CWE-862Published 2026-09-17 · Updated 2026-09-18

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Impact type: Security bypass
Confidentiality · integrity · availability: None · Low · None
Fix status: No fix listed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-862.

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

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00315 24th percentileScored 2026-11-07

Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: Yes
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
melograno	Booking for Appointments and Events Calendar – Amelia	up to 2.4.5	—	No fix listed	CNA

Booking for Appointments and Events Calendar – Amelia Vendormelograno Affected up to 2.4.5 Fixed in — No fix listed CNA

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2026-16582
2026-10-03 Alias added: GHSA-29vh-pvp9-x94x

References

Other 2

TI-2026-07957 Improper privilege management in melograno Booking for Appointments and Events Calendar… CVSS 3.1CRITICAL 9.8
TI-2026-81737 Arbitrary file upload in The Innovative Form Builder IvyForms plugin CVSS 3.1HIGH 8.8
TI-2026-05512 Cross-site scripting in melograno Booking for Appointments and Events Calendar – Amelia CVSS 3.1HIGH 7.2
TI-2026-86488 Missing authorization in Amelia plugin exposes event attendee data CVSS 3.1HIGH 7.5
TI-2026-83520 Sensitive data exposure in Amelia booking plugin for WordPress CVSS 3.1MEDIUM 5.3
TI-2026-86487 Missing authorization in Amelia plugin exposes booking records CVSS 3.1MEDIUM 6.5

See all 9 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences