/usr/include/cegui-0.8.7/CEGUI/XMLParserModules/ is in libcegui-mk2-dev 0.8.7-2.
This file is owned by root:root, with mode 0o755.
..
/usr/include/cegui-0.8.7/CEGUI/XMLParserModules/Expat/
/usr/include/cegui-0.8.7/CEGUI/XMLParserModules/Expat/XMLParser.h
/usr/include/cegui-0.8.7/CEGUI/XMLParserModules/Expat/XMLParserModule.h
/usr/include/cegui-0.8.7/CEGUI/XMLParserModules/Libxml2/
/usr/include/cegui-0.8.7/CEGUI/XMLParserModules/Libxml2/XMLParser.h
/usr/include/cegui-0.8.7/CEGUI/XMLParserModules/Libxml2/XMLParserModule.h
/usr/include/cegui-0.8.7/CEGUI/XMLParserModules/RapidXML/
/usr/include/cegui-0.8.7/CEGUI/XMLParserModules/RapidXML/XMLParser.h
/usr/include/cegui-0.8.7/CEGUI/XMLParserModules/RapidXML/XMLParserModule.h
/usr/include/cegui-0.8.7/CEGUI/XMLParserModules/TinyXML/
/usr/include/cegui-0.8.7/CEGUI/XMLParserModules/TinyXML/XMLParser.h
/usr/include/cegui-0.8.7/CEGUI/XMLParserModules/TinyXML/XMLParserModule.h
/usr/include/cegui-0.8.7/CEGUI/XMLParserModules/Xerces/
/usr/include/cegui-0.8.7/CEGUI/XMLParserModules/Xerces/XMLParser.h
/usr/include/cegui-0.8.7/CEGUI/XMLParserModules/Xerces/XMLParserModule.h
/usr/include/cegui-0.8.7/CEGUI/XMLParserModules/Xerces/XMLParserProperties.h