CVE-2026-5203 | CMS Made Simple up to 2.2.22 UserGuide Module XML Import class.UserGuideImporterExporter.php _copyFilesToFolder path traversal

VDB-354331 · CVE-2026-5203 · GCVE-100-354331 CMS MADE SIMPLE UP TO 2.2.22 USERGUIDE MODULE XML IMPORT CLASS.USERGUIDEIMPORTEREXPORTER.PHP _COPYFILESTOFOLDER PATH TRAVERSAL HISTORYDIFFRELATEJSONXMLCTI 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. 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 🔒 🔒 🔒 CVSSv4info VulDB Vector: 🔒 VulDB Reliability: 🔍 CVSSv3info VulDB Meta Base Score: 4.7 VulDB Meta Temp Score: 4.3 VulDB Base Score: 4.7 VulDB Temp Score: 4.3 VulDB Vector: 🔒 VulDB Reliability: 🔍 CVSSv2info Vector Complexity Authentication Confidentiality Integrity Availability Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock VulDB Base Score: 🔒 VulDB Temp Score: 🔒 VulDB Reliability: 🔍 Exploitinginfo Class: Path traversal CWE: CWE-22 CAPEC: 🔒 ATT&CK: 🔒 Physical: No Local: No Remote: Yes Availability: 🔒 Access: Public Status: Proof-of-Concept Download: 🔒 Google Hack: 🔒 Price Prediction: 🔍 Current Price Estimation: 🔒 0-Day Unlock Unlock Unlock Unlock Today Unlock Unlock Unlock Unlock Threat Intelligenceinfo Interest: 🔍 Active Actors: 🔍 Active APT Groups: 🔍 Countermeasuresinfo Recommended: no mitigation known Status: 🔍 0-Day Time: 🔒 Timelineinfo 03/31/2026 Advisory disclosed 03/31/2026 +0 days VulDB entry created 03/31/2026 +0 days VulDB entry last update Sourcesinfo Advisory: drive.proton.me Status: Not defined CVE: CVE-2026-5203 (🔒) GCVE (CVE): GCVE-0-2026-5203 GCVE (VulDB): GCVE-100-354331 scip Labs: https://www.scip.ch/en/?labs.20161013 Entryinfo Created: 03/31/2026 10:45 Changes: 03/31/2026 10:45 (57) Complete: 🔍 Submitter: caginkyr Cache ID: 99:4B2:101 Submitinfo Accepted Submit #772855: CMSMadeSimple CMS Made Simple (CMSMS) 2.2.22 and old versions modules/UserGuide/lib/class.UserGuideImporterExporter.php (by caginkyr) Discussion No comments yet. Languages: en. Please log in to comment. ◂ PreviousOverviewNext ▸