CVE-2026-39390

CI4MS is a CodeIgniter 4-based CMS skeleton that delivers a production-ready, modular architecture with RBAC authorization and theme support. Prior to 0.31.4.0, the Google Maps iframe setting (cMap field) in compInfosPost() sanitizes input using strip_tags() with an <iframe> allowlist and regex-based removal of on\w+ event handlers. However, the srcdoc attribute is not an event handler and passes all filters. An attacker with admin settings access can inject an <iframe srcdoc="..."> payload with HTML-entity-encoded JavaScript that executes in the context of the parent page when rendered to unauthenticated frontend visitors. This vulnerability is fixed in 0.31.4.0.

The following products are affected by CVE-2026-39390 vulnerability.

Here, you will find a curated list of external links that provide in-depth information to CVE-2026-39390.

URL	Resource
https://github.com/ci4-cms-erp/ci4ms/security/advisories/GHSA-x3hr-cp7x-44r2