/usr/include/CEGUI/XMLParserModules/ is in libcegui-mk2-dev 0.7.5-8.
This file is owned by root:root, with mode 0o755.
..
/usr/include/CEGUI/XMLParserModules/ExpatParser/
/usr/include/CEGUI/XMLParserModules/ExpatParser/CEGUIExpatParser.h
/usr/include/CEGUI/XMLParserModules/ExpatParser/CEGUIExpatParserModule.h
/usr/include/CEGUI/XMLParserModules/LibxmlParser/
/usr/include/CEGUI/XMLParserModules/LibxmlParser/CEGUILibxmlParser.h
/usr/include/CEGUI/XMLParserModules/LibxmlParser/CEGUILibxmlParserModule.h
/usr/include/CEGUI/XMLParserModules/TinyXMLParser/
/usr/include/CEGUI/XMLParserModules/TinyXMLParser/CEGUITinyXMLParser.h
/usr/include/CEGUI/XMLParserModules/TinyXMLParser/CEGUITinyXMLParserModule.h
/usr/include/CEGUI/XMLParserModules/XercesParser/
/usr/include/CEGUI/XMLParserModules/XercesParser/CEGUIXercesParser.h
/usr/include/CEGUI/XMLParserModules/XercesParser/CEGUIXercesParserModule.h
/usr/include/CEGUI/XMLParserModules/XercesParser/CEGUIXercesParserProperties.h