CVE-2026-45138: CI4-CMS-ERP CI4MS

Medium severity, CVSS 5.4. EPSS: 0.2% chance of exploitation in the next 30 days.

CI4MS is a CodeIgniter 4-based content management system skeleton. Prior to version 0.31.9.0, the custom `html_purify` validation rule used to sanitize blog post bodies relies on by-reference mutation (`?string &$str`), but CodeIgniter 4's validator passes a local copy of the value, so the sanitized text is silently discarded. The Blog controller writes `$lanData['content']` directly into `blog_langs.content`, and the public template echoes it without escaping — yielding stored XSS executable in any visitor's browser, including the superadmin when previewing or editing posts. Version 0.31.9.0 patches the issue.

Affected products

• CI4-CMS-ERP CI4MS: before 0.31.9.0 (fixed in 0.31.9.0)

Published 2026-07-20. Last modified 2026-07-21.