CVE-2026-15601: themeum kirki – freeform page builder, website builder & customizer Path Traversal

Vulnerability summary

CVE-2026-15601 is a medium (CVSS 4.9) Path Traversal vulnerability in themeum kirki – freeform page builder, website builder & customizer. EPSS estimates a 1.14% chance of exploitation in the next 30 days, higher than 66.1% of scored vulnerabilities. Fixed in 6.1.0.

Timeline

1. 01-08-2026
   PublishedVulnerability first disclosed.
2. 03-08-2026
   Last modifiedVulnerability information updated.

Description

The Kirki – Freeform Page Builder, Website Builder & Customizer plugin for WordPress is vulnerable to Path Traversal (Zip Slip) in all versions up to, and including, 6.0.13 via the extract_zip_file function. This makes it possible for authenticated attackers, with custom-level access and above, to write arbitrary files on the server, which can allow for remote code execution. The install_app, update_app, and get_kirki_template_from_zip code paths accept a user-supplied app src value to construct the download URL, and no sanitization is applied to prevent a crafted ZIP from being fetched and extracted with path-traversing entry names that escape the intended destination directory.

• CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.