修复富文本编辑器引起的XSS安全问题-Toy模板网

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前言

在平时使用的富文本编辑器中也会存在恶意输入JS脚本

使用js-xss 对文本进行过滤，删除掉可能存在的脚本

安装

NPM

npm install xss

Bower

bower install xss

使用

在Node中使用

var xss = require("xss");
var html = xss('<script>alert("xss");</script>');
console.log(html);

浏览器中使用

<script src="https://rawgit.com/leizongmin/js-xss/master/dist/xss.js"></script>
<script>
// 使用函数名 filterXSS，用法一样
var html = filterXSS('<script>alert("xss");</scr' + 'ipt>');
alert(html);
</script>

语法

xss接收两个参数，第一个参数 HtmlString 需要被处理的html字符串，第二个参数 options 如何处理 hmtl 的配置项文章来源地址https://www.toymoban.com/news/detail-506205.html

/*
* 只允许a标签，该标签只允许href, title, target这三个属性
var options = {
  // 白名单
  whiteList: {
    a: ["href", "title", "target"]
  },
  // 过滤掉不再白名单的标签
  stripIgnoreTag: true,
  // script标签较特殊，需要过滤标签中间的内容
  stripIgnoreTagBody: ["script"],
  // 更多文档 https://gitee.com/meiyou_ruguo/js-xss?_from=gitee_search
};
*/
const = options = {}; // 自定义规则
const html = xss('<script>alert("xss");</script>', options);

项目中使用

const xss = require("xss");
function getDefaultWhiteList() {
    return {
        a: ["target", "href", "title"],
        abbr: ["title"],
        address: [],
        area: ["shape", "coords", "href", "alt"],
        article: [],
        aside: [],
        audio: ["autoplay", "controls", "loop", "preload", "src"],
        b: [],
        bdi: ["dir"],
        bdo: ["dir"],
        big: [],
        blockquote: ["cite"],
        br: [],
        caption: [],
        center: [],
        cite: [],
        code: [],
        col: ["align", "valign", "span", "width"],
        colgroup: ["align", "valign", "span", "width"],
        dd: [],
        del: ["datetime"],
        details: ["open"],
        div: [],
        dl: [],
        dt: [],
        em: [],
        font: ["color", "size", "face"],
        footer: [],
        h1: [],
        h2: [],
        h3: [],
        h4: [],
        h5: [],
        h6: [],
        header: [],
        hr: [],
        i: [],
        img: ["src", "alt", "title", "width", "height"],
        ins: ["datetime"],
        li: [],
        mark: [],
        nav: [],
        ol: [],
        p: [],
        pre: [],
        s: [],
        section: [],
        small: [],
        span: [],
        sub: [],
        sup: [],
        strong: [],
        table: ["width", "border", "align", "valign","style"],
        tbody: ["align", "valign"],
        td: ["width", "rowspan", "colspan", "align", "valign","style"],
        tfoot: ["align", "valign"],
        th: ["width", "rowspan", "colspan", "align", "valign"],
        thead: ["align", "valign"],
        tr: ["rowspan", "align", "valign"],
        tt: [],
        u: [],
        ul: [],
        video: ["autoplay", "controls", "loop", "preload", "src", "height", "width"],
        style:[]   //新添
    };
}
const options = {
    whiteList: getDefaultWhiteList(),
    stripIgnoreTag: true,
    stripIgnoreTagBody: ['script']
}
let editorHtml = editor.txt.html() // 确保这里拿到的是 <script>xxx</script>,如果是 &lt;xxx&gt; 则需要替换
// 替换 &lt; &gt;
// editor.txt.html().replaceAll('&lt;', '<').replaceAll('&gt;', '>');
const html = xss(editorHtml, options);
console.log(html);