CVE-2026-102173 Cross-site scripting in Kirki – Freeform Page Builder, Website Builder & Customizer
Unauthenticated attackers can inject arbitrary scripts via registration metadata in the Kirki WordPress plugin, requiring public registration and specific page elements.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-102173?
CVE-2026-102173 is a high-severity cross-site scripting vulnerability in themeum Kirki – Freeform Page Builder, Website Builder & Customizer, published on 7 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
The Kirki – Freeform Page Builder, Website Builder & Customizer plugin for WordPress is vulnerable to Stored Cross-Site Scripting via registration metadata in all versions up to, and including, 6.3.1 This is due to insufficient escaping in `ExceptionalElements::image_element()`, which concatenates a user-meta value straight into an `<img src="…">` attribute. This makes it possible for unauthenticated attackers to inject arbitrary web scripts that execute whenever a user accesses a page rendering a Kirki users collection whose image element is bound to one of the nine registration meta fields. Requires public user registration to be enabled and a published page carrying a `kirki-register` element, which prints the required element nonce into the public markup.
Weakness: CWE-79
Which versions are affected by CVE-2026-102173?
How do I fix CVE-2026-102173?
No fix has been published for CVE-2026-102173 yet. Limit exposure of the affected software until one is available.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2026-102173 being exploited?
There is no known exploitation of CVE-2026-102173 in the wild and no public exploit code.
Sources
Also known as GHSA-7vc3-qmp9-p8w8.