Kirki – Freeform Page Builder, Website Builder & Customizer <= 6.3.1 - Authenticated (Subscriber+) Arbitrary Shortcode Execution via 'display_name'
The Kirki – Freeform Page Builder, Website Builder & Customizer plugin for WordPress is vulnerable to arbitrary shortcode execution in all versions up to, and including, 6.3.1. This is due to the plugin substituting a user's display_name into the composed page markup unfiltered and then running the whole result through do_shortcode() in TheFrontend::replace_content(). Because display_name is writable by any user on their own account through the core profile form, this makes it possible for authenticated attackers with Subscriber-level access and above to execute arbitrary shortcodes. Where the page is a users collection — an ordinary team or member-directory page — the shortcode runs in the request of every visitor, including unauthenticated ones. Exploitation requires a published page with a Kirki element whose dynamic content is bound to the display_name user field.
What to do
Update to version 6.3.2 or later.
Affected software
Click a technology to see all vulnerabilities affecting it.
| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| WordPress plugin | Kirki – Freeform Page Builder, Website Builder & Customizer | <= 6.3.1 | 6.3.2 |
References
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N- Weakness (CWE)
CWE-74- Platform
- WordPress
- Package
Kirki – Freeform Page Builder, Website Builder & Customizer- Disclosed
- 09.10.2026
- Updated
- 13.10.2026 13:53
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Vulnerability history: Kirki – Freeform Page Builder, Website Builder & Customizer
All published vulnerabilities of this package (WordPress plugin), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 36
- First → latest
- 05.2026 10.2026
- Without a fix
- 0
- Exploited in attacks
- 0
Severity breakdown
- Critical 3
- High 11
- Medium 22
Disclosures per year
- 2026: 36
-
Kirki – Freeform Page Builder, Website Builder & Customizer <= 6.3.1 - Authenticated (Subscriber+) Arbitrary Shortcode Execution via 'display_name' this entry
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