Path Traversal Vulnerability in CMS Made Simple UserGuide Module
CVE-2026-5203

5.1MEDIUM

Key Information:

Vendor

CMS Made Simple

Status
Cms Made Simple
Vendor
CVE Published:
31 March 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-5203?

An identified vulnerability in CMS Made Simple versions up to 2.2.22 affects the _copyFilesToFolder function located in the UserGuide Module XML Import component. This vulnerability allows an attacker to exploit path traversal, enabling them to manipulate file paths and potentially access restricted directories. The exploit can be executed remotely, making it a significant concern for website administrators. The issue was acknowledged publicly, and a fix is planned for the subsequent release.

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Affected Version(s)

CMS Made Simple 2.2.0

CMS Made Simple 2.2.1

CMS Made Simple 2.2.2

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-5203 - Proof of Concept

References

https://vuldb.com/vuln/354331
vdb-entrytechnical-description
https://vuldb.com/vuln/354331/cti
signaturepermissions-required
https://vuldb.com/submit/772855
third-party-advisory

CVSS V4

Score:
5.1
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

caginkyr (VulDB User)
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