CVE-2026-16747

Kirki < 6.2.1 - Unauthenticated Arbitrary Shortcode Execution via Form Email Actions

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.

We have discovered 3,093 live websites that are affected by CVE-2026-16747.

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Affected Software

Product  Kirki Customizer Framework
Category Wordpress Plugins
Vulnerable Domains3,093 live websites (100% of Kirki Customizer Framework install base)
Vulnerable Versions
  • from 0 through 6.2.1
Vulnerable Versions Count20 versions ( 100% of all versions)


Common Weakness Enumeration

CWE-74 Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')



Details

  • Published - Aug 12, 2026
  • Updated - Aug 12, 2026

Credits

  • Jakub Herman (finder)
  • WPScan (coordinator)

Website Distribution by Country

Number of websites using CVE-2026-16747
United States737 websites


Germany338 websites
France246 websites
Italy221 websites
Poland150 websites
GB113 websites
Spain100 websites
Russia85 websites
Netherlands71 websites
India60 websites

Website Distribution by TLD

Number of websites using CVE-2026-16747
.com1,413 websites
.de188 websites
.it129 websites
.pl110 websites
.fr93 websites
.org86 websites
.ru66 websites
.co.uk54 websites
.nl53 websites
.net47 websites

Vulnerable Versions

Vulnerable versions are highlighted in red

Websites affected by CVE-2026-16747

Top websites that are affected by CVE-2026-16747. Please click on the "Contact us" link to get more information.
DomainCountryRankContacts
*******.com United States**,***
*******.com United States**,***
********.**.za South Africa***,***
********.nl Netherlands***,***
**********.be Belgium***,***
*******************.pl Poland***,***
**********.com China***,***
************************.org United States***,***
***********************.xn--p1ai Russia***,***
************.com Cyprus***,***
See full domain list

FAQ

CVE-2026-16747 is Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection') in Kirki Customizer Framework
A total of 3,093 websites have been identified as vulnerable to CVE-2026-16747, based on global website indexing conducted by WebTechSurvey.
The Kirki Customizer Framework is affected by the CVE-2026-16747 vulnerability.
Kirki Customizer Framework versions up to 6.2.1 are vulnerable to CVE-2026-16747.
CVE-2026-16747 is resolved in version 6.2.1 of Kirki Customizer Framework.