# Display Eventbrite Events <= 6.9.1 - Authenticated (Contributor+) Stored Cross-Site Scripting via booknow_text Shortcode and Block Attribute

- **ID:** WPSEC-2026-2759
- **Plugin:** Display Eventbrite Events (`widget-for-eventbrite-api`), https://wordpress.org/plugins/widget-for-eventbrite-api/
- **Affected versions:** from 4.0 before 6.9.2
- **Fixed in:** 6.9.2 (Update to 6.9.2 or later.)
- **Severity:** Medium 6.4 (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N)
- **Weakness:** CWE-79
- **Usage among sites WPSec scans:** plugin Low, affected versions Low (as of 2026-11-10)
- **Attack surface analysis:** https://attacksurface.wpsec.com/plugin/widget-for-eventbrite-api
- **Fix released:** 2026-11-08
- **Published:** 2026-11-09
- **URL:** https://wpsec.com/vuln/WPSEC-2026-2759/

## Description

The Display Eventbrite Events plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'booknow_text' attribute of the [wfea] shortcode and of the Display Eventbrite Events block in all versions up to, and including, 6.9.1, due to insufficient output escaping. The value is filtered only with wp_kses_post(), which keeps double quotes, and is then printed inside the aria-label attribute of the Book Now link. This makes it possible for authenticated attackers, with contributor-level access and above, to break out of the attribute and inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

## References

- https://wpsec.com/vuln/WPSEC-2026-2759/
- https://plugins.svn.wordpress.org/widget-for-eventbrite-api/tags/6.9.2/
- https://wordpress.org/plugins/widget-for-eventbrite-api/

Source: WPSec, https://wpsec.com/vuln/WPSEC-2026-2759/

License: CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Free to use, share and adapt, also commercially, if you credit WPSec and link to this advisory.