CVE-2026-45270

HIGH

CI4MS: Stored XSS in Pages Module Content via Broken html_purify Validation Rule

Title source: cna
STIX 2.1

Description

CI4MS is a CodeIgniter 4-based content management system skeleton. Prior to version 0.31.9.0, the `Pages` backend module registers the `html_purify` validation rule on language-keyed page content but persists the raw, un-purified POST value into the database. The public renderer for pages (`Home::index()` → `app/Views/templates/default/pages.php`) emits `$pageInfo->content` without `esc()`, yielding stored XSS that fires for every public visitor of the affected page — including administrators. Because pages may be promoted to the site home page, the payload can be served at `/` and reach every visitor of the site. Version 0.31.9.0 patches the issue.

References (2)

Core 2
Core References

Scores

CVSS v3 8.7
EPSS 0.0021
EPSS Percentile 11.0%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N

CISA SSVC

Vulnrichment
Exploitation poc
Automatable no
Technical Impact partial

Details

CWE
CWE-79
Status published
Products (1)
ci4-cms-erp/ci4ms < 0.31.9.0
Published Jul 20, 2026
Tracked Since Jul 20, 2026