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CVE-2026-45270

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

Published: Jul 20, 2026Updated: Jul 21, 2026 Sources: CVE List NVDCWE-79
8.7HIGH
NVD MITRE
EPSS Score
0.4%
Top 70.2%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
No Fix Available
Self-Check
Not available

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.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:LPR:LUI:RS:CC:HI:HA:N
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:LPrivileges Required
Low
UI:RUser Interaction
Required
Scope
S:CScope
Changed
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:NAvailability
None
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Weaknesses

CWE-79

Affected Products

ci4-cms-erp
aka ci4ms
ci4msOn-prem
Enterprise Software / erp

Exploitability

No known exploits, KEV entries, or remediation guidance available for this vulnerability yet.
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Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

2 techniques
Execution
Initial Access
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References

https://github.com/ci4-cms-erp/ci4ms/security/advisories/GHSA-gqr2-7hcg-rchf
github.com
https://github.com/ci4-cms-erp/ci4ms/releases/tag/0.31.9.0
github.com

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