EUVD-2026-67465
GHSA-6v29-784x-wf4r
Severity by source
AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
UI:R corrected from provided UI:N because exploitation requires administrator hover interaction; all other metrics unchanged from vendor vector.
Primary rating from Vendor (Wordfence).
CVSS VectorVendor: Wordfence
Lifecycle Timeline
2DescriptionCVE.org
The 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.
Articles & Coverage 1
AnalysisAI
Stored XSS in the Amelia WordPress booking plugin (versions ≤ 2.2) allows unauthenticated attackers to persist malicious JavaScript that fires when a site administrator views the Calendar page. The attack chain exploits two compounding weaknesses: an explicit nonce-verification skip in AddBookingCommand (Command.php:186) that permits unauthenticated booking submissions, and unsafe interpolation of customer name fields into JavaScript template literals rendered via innerHTML in the FullCalendar eventContent callback (redesign/dist/index.js:199). …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | No authentication is required - the Amelia AddBookingCommand explicitly skips WordPress nonce verification (Command.php:186), meaning the public booking endpoint accepts and persists arbitrary customer name data without any session or capability check. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 base score of 7.2 (AV:N/AC:L/PR:N/UI:N/S:C) reflects the network-reachable, zero-authentication write surface and scope change into the administrator's browser context. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Update the Amelia plugin to the version released after changeset 3505826 via the WordPress admin dashboard or wp-cli (wp plugin update ameliabooking). … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours: identify all WordPress installations running Amelia plugin version 2.2 or earlier via inventory management tools; disable the plugin immediately if booking functionality is not essential for operations. …
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External POC / Exploit Code
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