Path Traversal in Themeum Kirki – Freeform Page Builder, Website Builder & Customizer

CVE-2026-17604

The Kirki – Freeform Page Builder, Website Builder & Customizer plugin for WordPress is vulnerable to Directory Traversal in all versions up to, and including, 6.1.1 via the 'data' parameter parameter. This makes it possible for authenticated attackers, with editor-level access and above, to read the contents of arbitrary files on the server, which can contain sensitive information. The intended strpos()-based guard against leaving the uploads directory is bypassed by crafting a URL that includes the uploads base path as a substring while embedding directory traversal sequences, such as /wp-content/uploads/../../wp-config.php.

Vulnerability class: Path Traversal (Directory Traversal)

Published · last modified .

CVSS v3 metric

CVSS v3 base score 4.9 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N.

EPSS exploit prediction

EPSS: 0.012 (66.9th percentile), scored .

Low probability of exploitation in the next 30 days, but still tracked. 67th percentile — 66.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2026-17604: held from 0.008 to 0.012.

EPSS over last 30 days · oldest: 0.008 · newest: 0.012 · change: +0.004

Affected products

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-17604?
CVE-2026-17604 is a medium-severity vulnerability in Themeum Kirki – Freeform Page Builder, Website Builder & Customizer, classified under Path Traversal. CVSS score: 4.9/10. Published 2026-08-16.
How severe is CVE-2026-17604?
Medium severity. CVSS v3 base score is 4.9 out of 10.