Path traversal in Kirby - #VU150662
Published: September 17, 2026
Vulnerability identifier: #VU150662
CSH Severity: Low
CVSS v4: 7.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N]
CVE-ID: N/A
CWE-ID: CWE-22
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to modify page content and create text files in arbitrary writable locations.
The vulnerability exists due to path traversal in the template prop in Page::create() and $page->createChild() when processing a template name during page creation. A remote user can submit a crafted template name to modify page content and create text files in arbitrary writable locations.
Written files use the configured content extension and are only written, not read.
Affected software
Kirby
Remediation
Install security update from vendor's website.
Kirby - addressed in versions 4.9.6, 5.6.0