Executive brief
Kirby is missing permission checks in the content changes API
Affected products
- Packagist getkirby/cms
Junglewise Threat Intelligence
CVE-2026-21896: Kirby is missing permission checks in the content changes API
CVE-2026-21896 · Severity: medium · CVSS 4 · Published 2026-01-08
Technologies: getkirby/cms (Packagist). Vendors: Packagist.
Related threats
- Kirby is an open-source content management system. From 5.0.0 until 5.5.2, Kirby's REST API chunk upload handler in src/Api/Upload.php did n
- Kirby CMS path traversal and PHP file inclusion in user lookup
- Withdrawn Advisory: Kirby CMS has Persistent DoS via Malformed Image Upload
- Kirby CMS has cross-site scripting (XSS) in the changes dialog
- Kirby vulnerable to Cross-site scripting (XSS) in the link field "Custom" type