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TI-2026-63087 Aliases CVE-2026-93655GHSA-f9mc-qc82-mqr7

Booking Calendar <= 11.8.3 - Reflected Cross-Site Scripting via 'wpbc_auto_fill' Parameter

Priority LOW 27CWE-79Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Required
Attack complexity
Low
Impact type
Cross-site scripting
Confidentiality · integrity · availability
Low · Low · None
Fix status
No fix listed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-79.

Summary

The Booking Calendar plugin for WordPress is vulnerable to Reflected Cross-Site Scripting via the 'wpbc_auto_fill' parameter in all versions up to, and including, 11.8.3 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that execute if they can successfully trick a user into performing an action such as clicking on a link.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00368 30th 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
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
wpdevelopBooking Calendarup to 11.8.3—No fix listedCNA
  • Booking Calendar Vendorwpdevelop Affected up to 11.8.3 Fixed in — No fix listed CNA

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-93655
  2. 2026-10-03 Alias added: GHSA-f9mc-qc82-mqr7

References

Other 5

  • TI-2025-13137 Booking Calendar <= 10.14.8 - Unauthenticated SQL Injection via dates_to_check CVSS 3.1HIGH 7.5
  • TI-2026-62468 Booking Calendar <= 11.8.2 - Authenticated (Editor+) Privilege Escalation to 'data_name' Parameter CVSS 3.1HIGH 7.2
  • TI-2026-24886 WordPress Booking Calendar plugin <= 10.14.15 - SQL Injection vulnerability CVSS 3.1HIGH 7.6
  • TI-2026-42521 WordPress Booking Calendar plugin <= 11.4.2 - Cross Site Scripting (XSS) vulnerability CVSS 3.1HIGH 7.1
  • TI-2026-51992 WordPress Booking Calendar plugin <= 11.7 - Broken Access Control vulnerability CVSS 3.1MEDIUM 5.3
  • TI-2026-01129 Booking Calendar <= 10.14.13 - Missing Authorization to Unauthenticated Booking Details Exposure CVSS 3.1MEDIUM 5.3
See all 19 →

Sources

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