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TI-2023-04260 Aliases CVE-2023-4620GHSA-j6vq-hjmf-4p85

Booking Calendar < 9.7.3.1 - Unauthenticated Stored XSS

Priority MEDIUM 60Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Required
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
Low · Low · None
Fix status
Fixed

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA.

Summary

The Booking Calendar WordPress plugin before 9.7.3.1 does not sanitize and escape some of its booking from data, allowing unauthenticated users to perform Stored Cross-Site Scripting attacks against administrators

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00556 46th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by the CNA and NVD
Fix Fixed Booking Calendar (Unknown): 9.7.3.1

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
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
UnknownBooking Calendarbefore 9.7.3.19.7.3.1Patch availableCNA
  • Booking Calendar VendorUnknown Affected before 9.7.3.1 Fixed in 9.7.3.1 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:wpbookingcalendar:booking_calendar:*:*:*:*:*:wordpress:*:*before 9.7.3.1VulnerableWpbookingcalendar
  • cpe:2.3:a:wpbookingcalendar:booking_calendar:*:*:*:*:*:wordpress:*:* Versions before 9.7.3.1 Vulnerable ·Wpbookingcalendar

Remediation

  • Fix · CNA Booking Calendar (Unknown) Fixed in 9.7.3.1

Timeline

  1. 2026-10-02 Threatist record created from CVE-2023-4620
  2. 2026-10-03 Alias added: GHSA-j6vq-hjmf-4p85

References

Exploit 1

  • TI-2024-01122 Booking Calendar <= 9.9 - Unauthenticated SQL Injection CVSS 3.1CRITICAL 9.8
  • TI-2024-12845 WP Booking Calendar <= 10.10 - Unauthenticated Post-Confirmation Booking Manipulation CVSS 3.1MEDIUM 5.3
  • TI-2023-28172 WordPress Booking Calendar Plugin < 9.7.4 is vulnerable to Cross Site Scripting (XSS) CVSS 3.1MEDIUM 6.5
  • TI-2024-06429 WP Booking Calendar <= 10.2.1 - Authenticated (Contributor+) Stored Cross-Site Scripting via bookingform Shortcode CVSS 3.1MEDIUM 6.4
  • TI-2022-14610 WordPress Booking Calendar plugin <= 9.2.1 - Cross-Site Request Forgery (CSRF) vulnerabiulity CVSS 3.1MEDIUM 5.4

Sources

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