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The package manager in Sitecore CRM 8.1 Rev 151207 allows remote authenticated administrators to execute arbitrary ASP code by creating a ZIP archive in which a .asp file has a ..\ in its pathname, visiting sitecore/shell/applications/install/dialogs/Upload%20Package/UploadPackage2.aspx to upload this archive and extract its contents, and visiting a URI under sitecore/ to execute the .asp file.
Use Sitecore vendor hub and Crm product page to widen CVE-2017-5965 into its surrounding weakness, vendor, and product context.
Compare it with CVE-2017-5966 for nearby disclosures in the same product family.