CMS Made Simple up to 2.2.22 UserGuide Module XML Import class.UserGuideImporterExporter.php _copyFilesToFolder path traversal

Summaryinfo

A vulnerability was found in CMS Made Simple up to 2.2.22. It has been classified as critical. Affected is the function _copyFilesToFolder in the library modules/UserGuide/lib/class.UserGuideImporterExporter.php of the component UserGuide Module XML Import. This manipulation causes path traversal. This vulnerability is handled as CVE-2026-5203. The attack can be initiated remotely. Additionally, an exploit exists. This issue has been reported early to the project. They confirmed, that "this has already been discovered and fixed for the next release."

Detailsinfo

A vulnerability classified as critical was found in CMS Made Simple up to 2.2.22. Affected by this vulnerability is the function _copyFilesToFolder in the library modules/UserGuide/lib/class.UserGuideImporterExporter.php of the component UserGuide Module XML Import. The manipulation with an unknown input leads to a path traversal vulnerability. The CWE definition for the vulnerability is CWE-22. The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. As an impact it is known to affect confidentiality, integrity, and availability.

It is possible to read the advisory at drive.proton.me. This vulnerability is known as CVE-2026-5203. The exploitation appears to be easy. The attack can be launched remotely. The exploitation needs additional levels of successful authentication. Technical details and also a public exploit are known. The attack technique deployed by this issue is T1006 according to MITRE ATT&CK.

It is possible to download the exploit at drive.proton.me. It is declared as proof-of-concept. This issue has been reported early to the project. They confirmed, that "this has already been discovered and fixed for the next release." By approaching the search of inurl:modules/UserGuide/lib/class.UserGuideImporterExporter.php it is possible to find vulnerable targets with Google Hacking.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Type

• Content Management System

Name

• CMS Made Simple

Version

• 2.2.0
• 2.2.1
• 2.2.2
• 2.2.3
• 2.2.4
• 2.2.5
• 2.2.6
• 2.2.7
• 2.2.8
• 2.2.9
• 2.2.10
• 2.2.11
• 2.2.12
• 2.2.13
• 2.2.14
• 2.2.15
• 2.2.16
• 2.2.17
• 2.2.18
• 2.2.19
• 2.2.20
• 2.2.21
• 2.2.22

License

• open-source

CPE 2.3info

• 🔒
• 🔒
• 🔒

CPE 2.2info

• 🔒
• 🔒
• 🔒

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Threat Intelligenceinfo

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Submitinfo

Accepted

• Submit #772855: CMSMadeSimple CMS Made Simple (CMSMS) 2.2.22 and old versions modules/UserGuide/lib/class.UserGuideImporterExporter.php (by caginkyr)

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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