Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1359 CNY

100%
Buy Us a Coffee

CVE-2026-41203— ci4ms Theme::upload is vulnerable to Zip Slip leading to RCE

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开源的一个博客页面管理工具。 CI4MS 0.31.5.0之前版本存在路径遍历漏洞，该漏洞源于Theme::upload提取用户上传的ZIP归档时未验证条目名称，可能导致具有主题创建权限的认证用户写入任意文件系统位置并实现远程代码执行。

AI Predicted 8.6 Difficulty: Easy EPSS 0.72% · P52

Affected Version Matrix 1

VendorProduct Version RangeStatus
ci4-cms-erp ci4ms < 0.31.5.0 affected
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2026-41203

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
ci4ms Theme::upload is vulnerable to Zip Slip leading to RCE
Source: CVE Program / CVE List V5
Vulnerability Description
CI4MS is a CodeIgniter 4-based CMS skeleton that delivers a production-ready, modular architecture with RBAC authorization and theme support. Prior to version 0.31.5.0, ci4ms Theme::upload extracts user uploaded ZIP archives without validating entry names, allowing an authenticated backend user with the theme create permission to write files to arbitrary filesystem locations (Zip Slip) and achieve remote code execution by dropping a PHP file under the public web root. This issue has been patched in version 0.31.5.0.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
Source: CVE Program / CVE List V5
Vulnerability Type
对路径名的限制不恰当(路径遍历)
Source: CVE Program / CVE List V5
Vulnerability Title
CI4MS 路径遍历漏洞
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 0.31.5.0之前版本存在路径遍历漏洞，该漏洞源于Theme::upload提取用户上传的ZIP归档时未验证条目名称，可能导致具有主题创建权限的认证用户写入任意文件系统位置并实现远程代码执行。
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 < 0.31.5.0 -

II. Public POCs for CVE-2026-41203

# POC Description Source Link Shenlong Link
AI-Generated POC Premium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2026-41203

请登录查看更多情报信息。

Vendor Advisories for CVE-2026-41203 (1)

Vendor Pages for CVE-2026-41203 (1)

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-2026-41587 CI4MS: Unrestricted PHP File Upload via Theme Installation Leads to Authenticated Remote C
CVE-2026-41891 CI4MS: Deactivated User Session Bypass (active=0)

IV. Related Vulnerabilities

Same product: ci4ms
Same vendor: ci4-cms-erp
Same weakness: CWE-22

V. Comments for CVE-2026-41203

No comments yet

Leave a comment