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TI-2026-53524 Aliases CVE-2026-76586GHSA-h9qm-hc3c-qpr3

BookingPress 1.5.6 - 1.6.2 - Unauthenticated Booking Price Manipulation via PayPal Payment Confirmation

Priority LOW 39CWE-284Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Security bypass
Confidentiality · integrity · availability
None · High · None
Fix status
Fixed

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA. Impact type from CWE-284.

Summary

The Appointment Booking Calendar Plugin and Scheduling Plugin WordPress plugin before 1.6.3 does not verify the amount actually paid against the server-side price staged for a booking when confirming an online payment, allowing unauthenticated users to have a paid appointment approved for a fraction of its price.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00358 29th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by the CNA
Fix Fixed Appointment Booking Calendar Plugin and Scheduling Plugin (Unknown): 1.6.3

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

VendorProductAffected versionsFixed inStatusSource
UnknownAppointment Booking Calendar Plugin and Scheduling Plugin1.5.6 to before 1.6.31.6.3Patch availableCNA
  • Appointment Booking Calendar Plugin and Scheduling Plugin VendorUnknown Affected 1.5.6 to before 1.6.3 Fixed in 1.6.3 Patch available CNA

Remediation

  • Fix · CNA Appointment Booking Calendar Plugin and Scheduling Plugin (Unknown) Fixed in 1.6.3

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-76586
  2. 2026-10-03 Alias added: GHSA-h9qm-hc3c-qpr3

References

Exploit 1

Sources

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