CVE-2026-16747 Kirki < 6.2.1 - Unauthenticated Arbitrary Shortcode Execution via Form Email Actions
Unauthenticated attackers can execute arbitrary shortcodes via form actions, leading to admin email disclosure and mail relay abuse.
- 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-2026-16747?
CVE-2026-16747 is a medium-severity missing authorization vulnerability in Unknown Kirki, published on 12 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
The Kirki WordPress plugin before 6.2.1 does not properly authorise its front-end form submission REST routes and passes attacker-controlled input through shortcode execution, allowing unauthenticated users to run any shortcode registered on the site, which on a default install leads to disclosure of the site administrator's email address and an arbitrary-recipient mail relay from the victim's domain.
Weakness: CWE-74
Which versions are affected by CVE-2026-16747?
How do I fix CVE-2026-16747?
No fix has been published for CVE-2026-16747 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-16747 being exploited?
There is no known exploitation of CVE-2026-16747 in the wild and no public exploit code.
Sources
Also known as GHSA-p469-wjxr-57rr.