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

Quick assessment

Affected
ci4-cms-erp ci4ms
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
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，该漏洞源于自定义html_purify验证规则依赖引用传递，但CodeIgniter 4的验证器传递了本地副本，导致清理后的文本被静默丢弃，并且Blog控制器将$lanData['content']直接写入blog_langs.content，公共模板未经转义输出，容易受到存储型跨站脚本攻击。

CVSS 5.4 · Medium EPSS 0.24% · P15

Possible ATT&CK Techniques 1 AI

T1059 · Command and Scripting Interpreter

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-2026-45138

Vulnerability Information
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Vulnerability Title
CI4MS: Stored XSS in Blog 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 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/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，该漏洞源于自定义html_purify验证规则依赖引用传递，但CodeIgniter 4的验证器传递了本地副本，导致清理后的文本被静默丢弃，并且Blog控制器将$lanData['content']直接写入blog_langs.content，公共模板未经转义输出，容易受到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-2026-45138

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III. Intelligence Information for CVE-2026-45138

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Vendor Advisories for CVE-2026-45138 (1)

Vendor Pages for CVE-2026-45138 (1)

IV. Related Vulnerabilities

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

V. Comments for CVE-2026-45138

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