CVE-2026-45270

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

Published Jul 20, 2026 CVSS 3.1 · 8.7 High EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
Github GHSA Github GHSA GHSA-gqr2-7hcg-rchf CI4MS: Stored XSS in Pages Module Content via Broken html_purify Validation Rule
History
Type Values Removed Values Added
First Time appeared Ci4-cms-erp
Ci4-cms-erp ci4ms
Vendors & Products Ci4-cms-erp
Ci4-cms-erp ci4ms
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
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.
Title CI4MS: Stored XSS in Pages Module Content via Broken html_purify Validation Rule
Weaknesses CWE-79
References
Metrics cvssV3_1

{'score': 8.7, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
GitHub_M
Published
Updated
Jul 20, 2026, 3:11 PM
Reserved
May 11, 2026, 6:41 PM
Status
Deferred
Published
Jul 20, 2026, 3:16 PM
Modified
Oct 24, 2026, 8:10 PM