Booking for Appointments and Events Calendar <= 2.2 - Unauthenticated Stored Cross-Site Scripting via Customer Name Fields in Booking Submission

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-6286
StatePUBLISHED
AssignerWordfence
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-28 08:16:41 UTC
Updated2026-08-28 20:19:39 UTC
DescriptionThe Booking for Appointments and Events Calendar – Amelia plugin for WordPress is vulnerable to Stored Cross-Site Scripting via customer name fields in versions up to and including 2.2. This is due to an authentication bypass where the AddBookingCommand explicitly skips nonce verification (Command.php line 186), allowing unauthenticated users to submit booking data. While the plugin applies sanitize_text_field() to customer firstName and lastName fields (BookingApplicationService.php lines 302-308), this function only removes HTML tags and preserves special characters including double quotes. The vulnerability manifests in the administrative Calendar view where a FullCalendar eventContent callback interpolates customer names directly into JavaScript template literals (redesign/dist/index.js line 199) and renders them via innerHTML without proper HTML entity encoding. Because double quotes are preserved, an attacker can inject payloads like '" onmouseover="alert(document.cookie)"' to break out of the title attribute and inject malicious event handlers. This makes it possible for unauthenticated attackers to inject arbitrary web scripts that will execute when an administrator accesses the Calendar page and hovers over the malicious appointment.

Risk And Classification

Primary CVSS: v3.1 7.2 HIGH from [email protected]

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

EPSS: 0.004440000 probability, percentile 0.368500000 (date 2026-08-28)

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

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary7.2HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
3.1CNADECLARED7.2HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N

CVSS v3.1 Breakdown

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

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Melograno Booking For Appointments And Events Calendar Amelia affected 2.2 semver Not specified

References

ReferenceSourceLinkTags
plugins.trac.wordpress.org/browser/ameliabooking/tags/2.1.3/src/Application/Commands/Com... [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/ameliabooking/trunk/src/Application/Commands/Command.php [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/ameliabooking/trunk/redesign/dist/index.js [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/changeset/3499608 [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/changeset/3505826 [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/ameliabooking/tags/2.1.3/redesign/dist/index.js [email protected] plugins.trac.wordpress.org
www.wordfence.com/threat-intel/vulnerabilities/id/a330336e-82ad-41f4-b1b1-d93d9... [email protected] www.wordfence.com
plugins.trac.wordpress.org/browser/ameliabooking/tags/2.1.3/src/Application/Commands/Boo... [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/ameliabooking/tags/2.1.3/src/Application/Services/Boo... [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/ameliabooking/trunk/src/Application/Services/Booking/... [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/ameliabooking/trunk/src/Application/Commands/Booking/... [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: Lucas Montes (NiRoX) (en)

Additional Advisory Data

SourceTimeEvent
CNA2026-04-14T15:53:48.000ZVendor Notified
CNA2026-08-27T00:00:00.000ZDisclosed

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