A collection of dangerous extensions to filter out of file uploads.

dangerous-extensions.json

[
   {
      "ext":"adp",
      "description":"Access Project (Microsoft)"
   },
   {
      "ext":"app",
      "description":"Executable Application"
   },
   {
      "ext":"asp",
      "description":"Active Server Page"
   },
   {
      "ext":"bas",
      "description":"BASIC Source Code"
   },
   {
      "ext":"bat",
      "description":"Batch Processing"
   },
   {
      "ext":"cer",
      "description":"Internet Security Certificate File"
   },
   {
      "ext":"chm",
      "description":"Compiled HTML Help"
   },
   {
      "ext":"cmd",
      "description":"DOS CP/M Command File, Command File for Windows NT"
   },
   {
      "ext":"cnt",
      "description":"Help file index"
   },
   {
      "ext":"com",
      "description":"Command"
   },
   {
      "ext":"cpl",
      "description":"Windows Control Panel Extension (Microsoft)"
   },
   {
      "ext":"crt",
      "description":"Certificate File"
   },
   {
      "ext":"csh",
      "description":"csh Script"
   },
   {
      "ext":"der",
      "description":"DER Encoded X509 Certificate File"
   },
   {
      "ext":"exe",
      "description":"Executable File"
   },
   {
      "ext":"fxp",
      "description":"FoxPro Compiled Source (Microsoft)"
   },
   {
      "ext":"gadget",
      "description":"Windows Vista gadget"
   },
   {
      "ext":"hlp",
      "description":"Windows Help File"
   },
   {
      "ext":"hpj",
      "description":"Project file used to create Windows Help File"
   },
   {
      "ext":"hta",
      "description":"Hypertext Application"
   },
   {
      "ext":"inf",
      "description":"Information or Setup File"
   },
   {
      "ext":"ins",
      "description":"IIS Internet Communications Settings (Microsoft)"
   },
   {
      "ext":"isp",
      "description":"IIS Internet Service Provider Settings (Microsoft)"
   },
   {
      "ext":"its",
      "description":"Internet Document Set, Internet Translation"
   },
   {
      "ext":"js",
      "description":"JavaScript Source Code"
   },
   {
      "ext":"jse",
      "description":"JScript Encoded Script File"
   },
   {
      "ext":"ksh",
      "description":"UNIX Shell Script"
   },
   {
      "ext":"lnk",
      "description":"Windows Shortcut File"
   },
   {
      "ext":"mad",
      "description":"Access Module Shortcut (Microsoft)"
   },
   {
      "ext":"maf",
      "description":"Access (Microsoft)"
   },
   {
      "ext":"mag",
      "description":"Access Diagram Shortcut (Microsoft)"
   },
   {
      "ext":"mam",
      "description":"Access Macro Shortcut (Microsoft)"
   },
   {
      "ext":"maq",
      "description":"Access Query Shortcut (Microsoft)"
   },
   {
      "ext":"mar",
      "description":"Access Report Shortcut (Microsoft)"
   },
   {
      "ext":"mas",
      "description":"Access Stored Procedures (Microsoft)"
   },
   {
      "ext":"mat",
      "description":"Access Table Shortcut (Microsoft)"
   },
   {
      "ext":"mau",
      "description":"Media Attachment Unit"
   },
   {
      "ext":"mav",
      "description":"Access View Shortcut (Microsoft)"
   },
   {
      "ext":"maw",
      "description":"Access Data Access Page (Microsoft)"
   },
   {
      "ext":"mda",
      "description":"Access Add-in (Microsoft), MDA Access 2 Workgroup (Microsoft)"
   },
   {
      "ext":"mdb",
      "description":"Access Application (Microsoft), MDB Access Database (Microsoft)"
   },
   {
      "ext":"mde",
      "description":"Access MDE Database File (Microsoft)"
   },
   {
      "ext":"mdt",
      "description":"Access Add-in Data (Microsoft)"
   },
   {
      "ext":"mdw",
      "description":"Access Workgroup Information (Microsoft)"
   },
   {
      "ext":"mdz",
      "description":"Access Wizard Template (Microsoft)"
   },
   {
      "ext":"msc",
      "description":"Microsoft Management Console Snap-in Control File (Microsoft)"
   },
   {
      "ext":"msh",
      "description":"Microsoft Shell"
   },
   {
      "ext":"msh1",
      "description":"Microsoft Shell"
   },
   {
      "ext":"msh2",
      "description":"Microsoft Shell"
   },
   {
      "ext":"mshxml",
      "description":"Microsoft Shell"
   },
   {
      "ext":"msh1xml",
      "description":"Microsoft Shell"
   },
   {
      "ext":"msh2xml",
      "description":"Microsoft Shell"
   },
   {
      "ext":"msi",
      "description":"Windows Installer File (Microsoft)"
   },
   {
      "ext":"msp",
      "description":"Windows Installer Update"
   },
   {
      "ext":"mst",
      "description":"Windows SDK Setup Transform Script"
   },
   {
      "ext":"ops",
      "description":"Office Profile Settings File"
   },
   {
      "ext":"osd",
      "description":"Application virtualized with Microsoft SoftGrid Sequencer"
   },
   {
      "ext":"pcd",
      "description":"Visual Test (Microsoft)"
   },
   {
      "ext":"pif",
      "description":"Windows Program Information File (Microsoft)"
   },
   {
      "ext":"plg",
      "description":"Developer Studio Build Log"
   },
   {
      "ext":"prf",
      "description":"Windows System File"
   },
   {
      "ext":"prg",
      "description":"Program File"
   },
   {
      "ext":"pst",
      "description":"MS Exchange Address Book File, Outlook Personal Folder File (Microsoft)"
   },
   {
      "ext":"reg",
      "description":"Registration Information/Key for W95/98, Registry Data File"
   },
   {
      "ext":"scf",
      "description":"Windows Explorer Command"
   },
   {
      "ext":"scr",
      "description":"Windows Screen Saver"
   },
   {
      "ext":"sct",
      "description":"Windows Script Component, Foxpro Screen (Microsoft)"
   },
   {
      "ext":"shb",
      "description":"Windows Shortcut into a Document"
   },
   {
      "ext":"shs",
      "description":"Shell Scrap Object File"
   },
   {
      "ext":"ps1",
      "description":"Windows PowerShell"
   },
   {
      "ext":"ps1xml",
      "description":"Windows PowerShell"
   },
   {
      "ext":"ps2",
      "description":"Windows PowerShell"
   },
   {
      "ext":"ps2xml",
      "description":"Windows PowerShell"
   },
   {
      "ext":"psc1",
      "description":"Windows PowerShell"
   },
   {
      "ext":"psc2",
      "description":"Windows PowerShell"
   },
   {
      "ext":"tmp",
      "description":"Temporary File/Folder"
   },
   {
      "ext":"url",
      "description":"Internet Location"
   },
   {
      "ext":"vb",
      "description":"VBScript File or Any VisualBasic Source"
   },
   {
      "ext":"vbe",
      "description":"VBScript Encoded Script File"
   },
   {
      "ext":"vbp",
      "description":"Visual Basic project file"
   },
   {
      "ext":"vbs",
      "description":"VBScript Script File, Visual Basic for Applications Script"
   },
   {
      "ext":"vsmacros",
      "description":"Visual Studio .NET Binary-based Macro Project (Microsoft)"
   },
   {
      "ext":"vsw",
      "description":"Visio Workspace File (Microsoft)"
   },
   {
      "ext":"ws",
      "description":"Windows Script File"
   },
   {
      "ext":"wsc",
      "description":"Windows Script Component"
   },
   {
      "ext":"wsf",
      "description":"Windows Script File"
   },
   {
      "ext":"wsh",
      "description":"Windows Script Host Settings File"
   },
   {
      "ext":"xnk",
      "description":"Exchange Public Folder Shortcut"
   },
   {
      "ext":"ade",
      "description":"ADC Audio File"
   },
   {
      "ext":"cla   ",
      "description":"Java class File"
   },
   {
      "ext":"class",
      "description":"Java class File"
   },
   {
      "ext":"grp",
      "description":"Microsoft Widows Program Group"
   },
   {
      "ext":"jar",
      "description":"Compressed archive file package for Java classes and data"
   },
   {
      "ext":"mcf",
      "description":"MMS Composer File"
   },
   {
      "ext":"ocx",
      "description":"ActiveX Control file"
   },
   {
      "ext":"pl",
      "description":"Perl script language source code"
   },
   {
      "ext":"xbap",
      "description":"Silverlight Application Package"
   }
]