Booking Calendar <= 11.8.2 - Reflected Cross-Site Scripting via 'options' Parameter

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-92561
StatePUBLISHED
AssignerWordfence
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-18 07:16:51 UTC
Updated2026-09-18 07:16:51 UTC
DescriptionThe Booking Calendar plugin for WordPress is vulnerable to Reflected Cross-Site Scripting via the 'options' parameter in all versions up to, and including, 11.8.2 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. The nonce check is bypassed by default because the 'booking_is_nonce_at_front_end' option ships disabled, allowing unauthenticated requests to reach the vulnerable sink without any verification.

Risk And Classification

Primary CVSS: v3.1 6.1 MEDIUM from [email protected]

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

Problem Types: CWE-79 | CWE-79 CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

VersionSourceTypeScoreSeverityVector
3.1[email protected]Primary6.1MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
3.1CNADECLARED6.1MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

CVSS v3.1 Breakdown

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

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Wpdevelop Booking Calendar affected 11.8.2 semver Not specified

References

ReferenceSourceLinkTags
plugins.trac.wordpress.org/browser/booking/tags/11.8.2/core/timeline/v2/wpbc-class-timel... [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/booking/tags/11.8.2/core/lib/wpbc-ajax.php [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/changeset [email protected] plugins.trac.wordpress.org
www.wordfence.com/threat-intel/vulnerabilities/id/e8645b58-6b2a-4659-a002-d6224... [email protected] www.wordfence.com
plugins.trac.wordpress.org/browser/booking/tags/11.8.2/core/timeline/v2/wpbc-class-timel... [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/booking/tags/11.8.2/core/timeline/v2/wpbc-class-timel... [email protected] plugins.trac.wordpress.org
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: Yuto Hyakumoto (en)

Additional Advisory Data

SourceTimeEvent
CNA2026-09-16T13:41:04.000ZVendor Notified
CNA2026-09-17T18:25:30.000ZDisclosed

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