CVE-2026-41587— CI4MS: Unrestricted PHP File Upload via Theme Installation Leads to Authenticated Remote Code Execution
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I. Basic Information for CVE-2026-41587
Vulnerability Information
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Vulnerability Title
CI4MS: Unrestricted PHP File Upload via Theme Installation Leads to Authenticated Remote Code Execution
Source: NVD (National Vulnerability Database)
Vulnerability Description
CI4MS is a CodeIgniter 4-based CMS skeleton that delivers a production-ready, modular architecture with RBAC authorization and theme support. From version 0.26.0.0 to before version 0.31.7.0, a theme upload feature allows any authenticated backend user with theme-upload permission to achieve remote code execution (RCE) by uploading a crafted ZIP file. PHP files inside the ZIP are installed into the web-accessible public/ directory with no extension or content filtering, making them directly executable via HTTP. This issue has been patched in version 0.31.7.0.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
危险类型文件的不加限制上传
Source: NVD (National Vulnerability Database)
Vulnerability Title
CI4MS 代码问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
CI4MS是Ci4MS开源的一个博客页面管理工具。 CI4MS 0.26.0.0至0.31.7.0之前版本存在代码问题漏洞，该漏洞源于主题上传功能未过滤ZIP文件中的PHP文件，可能导致经过身份验证的用户通过上传特制ZIP文件实现远程代码执行。
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 | >= 0.26.0.0, < 0.31.7.0 | - |
II. Public POCs for CVE-2026-41587
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|---|
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- Merge commit from fork · ci4-cms-erp/ci4ms@b969465 · GitHubx_refsource_MISC
- https://nvd.nist.gov/vuln/detail/CVE-2026-41587
Same Patch Batch · ci4-cms-erp · 2026-05-07 · 6 CVEs total
| CVE-2026-41201 | 9.1 CRITICAL | CI4MS: Backup Management Full Account Takeover for All-Roles & Privilege-Escalation via St |
| CVE-2026-41202 | ci4ms Backup::restore is vulnerable to Zip Slip leading to RCE | |
| CVE-2026-41890 | CI4MS: Arbitrary Database Table Drop via Theme deleteProcess | |
| CVE-2026-41203 | ci4ms Theme::upload is vulnerable to Zip Slip leading to RCE | |
| CVE-2026-41891 | CI4MS: Deactivated User Session Bypass (active=0) |
IV. Related Vulnerabilities
Same product: ci4ms
- CVE-2026-41891
CI4MS: Deactivated User Session Bypass (active=0) - CVE-2026-41890
CI4MS: Arbitrary Database Table Drop via Theme deleteProcess - CVE-2026-41203
ci4ms Theme::upload is vulnerable to Zip Slip leading to RCE - CVE-2026-41202
ci4ms Backup::restore is vulnerable to Zip Slip leading to R - CVE-2026-41201
CI4MS: Backup Management Full Account Takeover for All-Roles
Same vendor: ci4-cms-erp
- CVE-2026-41891
CI4MS: Deactivated User Session Bypass (active=0) - CVE-2026-41890
CI4MS: Arbitrary Database Table Drop via Theme deleteProcess - CVE-2026-41203
ci4ms Theme::upload is vulnerable to Zip Slip leading to RCE - CVE-2026-41202
ci4ms Backup::restore is vulnerable to Zip Slip leading to R - CVE-2026-41201
CI4MS: Backup Management Full Account Takeover for All-Roles
Same weakness: CWE-434
- CVE-2021-47943
TextPattern CMS 4.8.7 Remote Code Execution via File Upload - CVE-2021-47937
e107 CMS 2.3.0 Authenticated Remote Code Execution via Theme - CVE-2026-41517
Emlog: Remote Code Execution via Malicious Plugin Upload - CVE-2026-6692
Slider Revolution 7.0.0 - 7.0.10 - Authenticated (Subscriber - CVE-2026-41938
Vvveb < 1.0.8.2 RCE via Media Upload Handler
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