Cross-site Scripting vulnerability in SimpleXLSXEx::readThemeColors, SimpleXLSXEx::getColorValue and SimpleXLSX::toHTMLEx
SimpleXLSX is software for parsing and retrieving data from Excel XLSx files. Starting in 1.0.12 and ending in 1.1.13, when calling the extended toHTMLEx method, it is possible to execute arbitrary JavaScript code. This vulnerability is fixed in 1.1.13.