WordPress Booking Calendar plugin <= 11.8.4 - Race Condition vulnerability

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-39601
StatePUBLISHED
AssignerPatchstack
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-10-02 15:17:09 UTC
Updated2026-10-05 08:17:15 UTC
DescriptionConcurrent 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.

Risk And Classification

Primary CVSS: v3.1 3.7 LOW from [email protected]

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N

EPSS: 0.001560000 probability, percentile 0.040870000 (date 2026-10-05)

Problem Types: CWE-362 | CWE-362 Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary3.7LOWCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N
3.1CNACVSS3.7LOWCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
Low
Availability
None

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA WPdevelop Booking Calendar affected 11.8.4 custom Not specified

References

ReferenceSourceLinkTags
patchstack.com/database/wordpress/plugin/booking/vulnerability/wordpress-boo... [email protected] patchstack.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: Ananda Dhakal (Patchstack) (en)

Additional Advisory Data

Solutions

CNA: Update the WordPress Booking Calendar plugin to the latest available version (at least 11.9).

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