CVE-2026-45138 – CI4MS: Stored XSS in Blog Content via Broken `html_purify` Validation Rule

CVE ID :CVE-2026-45138

Published : July 20, 2026, 12:16 a.m. | 1 hour, 25 minutes ago

Description :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.

Severity: 5.4 | MEDIUM

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