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TI-2026-65807 Aliases CVE-2026-39601GHSA-c83g-wfv6-9ghj

WordPress Booking Calendar plugin <= 11.8.4 - Race Condition vulnerability

Priority LOW 17CWE-362Published · Updated

Key facts

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

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

Summary

Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') vulnerability in WPdevelop Booking Calendar booking allows Leveraging Race Conditions.This issue affects Booking Calendar: from n/a through 11.8.4.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00151 4th 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 11.8.4—No fix listedCNA
  • Booking Calendar Vendorwpdevelop Affected up to 11.8.4 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-2026-39601
  2. 2026-10-03 Alias added: GHSA-c83g-wfv6-9ghj
  3. 2026-10-03 CISA SSVC decision points changed

References

Other 1

  • 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