WordPress security changelog
HIGH CVE-2026-6286 Deferred

Amelia booking names permit unauthenticated stored XSS against administrators

Amelia through 2.2 skips nonce verification in AddBookingCommand and accepts unauthenticated customer firstName and lastName values. Quotes survive sanitize_text_field(), are interpolated into FullCalendar event HTML, and can inject an event handler that executes when an administrator opens the Calendar and interacts with the malicious appointment.

CVE / CNA score 7.2 CVSS 3.1 · security@wordfence.com
NVD score Pending NVD has not published its own CVSS assessment.
Component
Booking for Appointments and Events Calendar – Amelia
Plugin slug
ameliabooking
Affected
<= 2.2
Safe version
See mitigation notes
Published
Aug 28, 2026
Weakness
CWE-79 — Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

This CVE was published Aug 28, 2026 and is one of 28 known issues for this plugin.

What to do

Update, patch or deactivate.

No fixed release is confirmed. Update Amelia when a release after 2.2 is confirmed to fix the issue; until then, restrict public booking when warranted and inspect appointment names before administrators use the Calendar view.

No confirmed safe version is listed. Consider a vendor-supported patch or temporarily restricting the affected functionality while you assess the risk.

Deactivate only when warranted by your risk profile, or when advised by your hosting provider in the limited circumstances where the vulnerability cannot otherwise be mitigated. If you’re unsure which action is appropriate, contact Fused or your hosting provider for guidance.

Source record

Technical description

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.

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

References

Primary and upstream sources