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CVE-2026-45270— CI4MS: Stored XSS in Pages Module Content via Broken html_purify Validation Rule

Quick assessment

Affected
ci4-cms-erp ci4ms
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

CI4MS是Ci4MS团队开源的一个博客页面管理工具。 CI4MS 0.31.9.0之前版本存在跨站脚本漏洞，该漏洞源于Pages后台模块对语言键控页面内容验证不足且未对输出进行清理，可能导致存储型跨站脚本攻击。

CVSS 8.7 · High EPSS 0.37% · P28

Affected Version Matrix 1

VendorProduct Version RangeStatus
ci4-cms-erp ci4ms < 0.31.9.0 affected
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I. Basic Information for CVE-2026-45270

Vulnerability Information
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Vulnerability Title
CI4MS: Stored XSS in Pages Module Content via Broken html_purify Validation Rule
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: CVE Program / CVE List V5
Vulnerability Title
CI4MS 跨站脚本漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
CI4MS是Ci4MS团队开源的一个博客页面管理工具。 CI4MS 0.31.9.0之前版本存在跨站脚本漏洞，该漏洞源于Pages后台模块对语言键控页面内容验证不足且未对输出进行清理，可能导致存储型跨站脚本攻击。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
ci4-cms-erp ci4ms < 0.31.9.0 -

II. Public POCs for CVE-2026-45270

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 8482 chars
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Vulnerability reproduction recording (real sandbox build + trigger, exclusive)
In-depth vulnerability mechanism
Trigger conditions & impact
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POC zip download
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III. Intelligence Information for CVE-2026-45270

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Vendor Advisories for CVE-2026-45270 (1)

Vendor Pages for CVE-2026-45270 (1)

IV. Related Vulnerabilities

Same product: ci4ms
Same vendor: ci4-cms-erp
Same weakness: CWE-79

V. Comments for CVE-2026-45270

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