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PHP CVE-2026-5203

| EUVD-2026-17508 LOW
Path Traversal (CWE-22)
2026-03-31 VulDB GHSA-6c3w-cf6g-qmgh
2.0
CVSS 4.0 · NVD

Severity by source

NVD PRIMARY
2.0 LOW
CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Attack Vector
Network
Attack Complexity
Low
Privileges Required
High
User Interaction
None
Scope
X

Lifecycle Timeline

6
Severity Changed
Apr 29, 2026 - 01:11 NVD
MEDIUM LOW
CVSS changed
Apr 29, 2026 - 01:11 NVD
5.1 (MEDIUM) 2.0 (LOW)
PoC Detected
Apr 01, 2026 - 14:24 vuln.today
Public exploit code
EUVD ID Assigned
Mar 31, 2026 - 16:00 euvd
EUVD-2026-17508
Analysis Generated
Mar 31, 2026 - 16:00 vuln.today
CVE Published
Mar 31, 2026 - 15:45 nvd
MEDIUM 5.1

DescriptionCVE.org

A vulnerability was found in CMS Made Simple up to 2.2.22. This impacts the function _copyFilesToFolder in the library modules/UserGuide/lib/class.UserGuideImporterExporter.php of the component UserGuide Module XML Import. The manipulation results in path traversal. It is possible to launch the attack remotely. The exploit has been made public and could be used. This issue has been reported early to the project. They confirmed, that "this has already been discovered and fixed for the next release."

AnalysisAI

Path traversal in CMS Made Simple UserGuide Module XML Import functionality allows authenticated high-privilege attackers to manipulate file operations in the _copyFilesToFolder function, enabling arbitrary file placement on the server with limited confidentiality and integrity impact. The vulnerability affects CMS Made Simple up to version 2.2.22, requires high-level privileges to exploit remotely, and vendor has confirmed a fix for a future release; publicly available exploit code exists but real-world risk remains moderate due to privilege requirements.

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Vulnerability AssessmentAI

Risk Assessment While the CVSS 4.0 score of 5.1 appears moderate, several factors contextualize real-world risk. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario An administrator account is compromised or a malicious insider with high-privilege CMS access uploads a specially crafted XML file via the UserGuide Module import feature. The XML payload includes path traversal sequences in file references that cause _copyFilesToFolder to write files outside the intended UserGuide directory-for example, writing a PHP webshell to the web root or overwriting configuration files. …
Remediation Upgrade CMS Made Simple to a version released after 2.2.22 that includes the path traversal fix; vendor has confirmed the issue is resolved in an upcoming release. … Detailed patch versions, workarounds, and compensating controls in full report.

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CVE-2026-5203 vulnerability details – vuln.today

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