Regular Expression Denial of Service (ReDoS) in lodash

All versions of package lodash prior to 4.17.21 are vulnerable to Regular Expression Denial of Service ReDoS via the toNumber, trim and trimEnd functions. Steps to reproduce provided by reporter Liyuan Chen: js var lo = require'lodash'; function buildblankn var ret = "1" for var i = 0; i n; i++ r...