Release v2.7.0

src/web/public/js/regions/region-utils.js

@@ -28,11 +28,19 @@
       var name = String(match[2] || '').toLowerCase();
       var attrText = String(match[3] || '');
       var selfClosing = Boolean(match[4]) || name === 'br' || name === 'hr';
-      var allowed = ['a', 'b', 'blockquote', 'br', 'code', 'div', 'em', 'figure', 'figcaption', 'h1', 'h2', 'h3', 'h4', 'h5', 'h6', 'hr', 'i', 'li', 'ol', 'p', 'pre', 'span', 'strong', 'sub', 'sup', 'table', 'tbody', 'td', 'th', 'thead', 'tr', 'u', 'ul'];
+      var allowed = ['a', 'b', 'blockquote', 'br', 'code', 'col', 'colgroup', 'div', 'em', 'figure', 'figcaption', 'h1', 'h2', 'h3', 'h4', 'h5', 'h6', 'hr', 'i', 'img', 'li', 'ol', 'p', 'pre', 'span', 'strong', 'sub', 'sup', 'table', 'tbody', 'td', 'th', 'thead', 'tr', 'u', 'ul'];
       if (allowed.indexOf(name) === -1) {
         return '';
       }
 
+      if (name === 'img') {
+        var srcMatch = String(attrText || '').match(/\bsrc\s*=\s*("([^"]*)"|'([^']*)'|([^\s"'>/=`]+))/i);
+        var srcValue = srcMatch ? String(srcMatch[2] !== undefined ? srcMatch[2] : srcMatch[3] !== undefined ? srcMatch[3] : srcMatch[4] !== undefined ? srcMatch[4] : '').trim() : '';
+        if (!srcValue || !/^(?:https?:\/\/|\/media\/|\/assets\/|\/[^/]|data:image\/)/i.test(srcValue)) {
+          return '';
+        }
+      }
+
       if (closing) {
         return '</' + name + '>';
       }
@@ -42,7 +50,100 @@
   }
 
   function sanitizeRichText(html) {
-    return sanitizePreviewHtml(html);
+    var output = String(html || '');
+    output = output.replace(/<script[\s\S]*?<\/script>/gi, '');
+    output = output.replace(/<style[\s\S]*?<\/style>/gi, '');
+    return output.replace(/<[^>]+>/g, function (tag) {
+      var match = tag.match(/^<\s*(\/?)\s*([a-z0-9]+)([\s\S]*?)(\/?)>$/i);
+      if (!match) {
+        return '';
+      }
+
+      var closing = Boolean(match[1]);
+      var name = String(match[2] || '').toLowerCase();
+      var attrText = String(match[3] || '');
+      var allowed = ['a', 'b', 'blockquote', 'br', 'code', 'col', 'colgroup', 'div', 'em', 'figure', 'figcaption', 'h1', 'h2', 'h3', 'h4', 'h5', 'h6', 'hr', 'i', 'img', 'li', 'ol', 'p', 'pre', 'span', 'strong', 'sub', 'sup', 'table', 'tbody', 'td', 'th', 'thead', 'tr', 'u', 'ul'];
+      if (allowed.indexOf(name) === -1) {
+        return '';
+      }
+
+      if (closing) {
+        return '</' + name + '>';
+      }
+
+      return '<' + name + sanitizeRichTextAttributes(name, attrText) + '>';
+    });
+  }
+
+  function sanitizeRichTextAttributes(tagName, attrText) {
+    var allowedAttributes = {
+      a: ['href', 'title', 'target', 'rel', 'class', 'style'],
+      blockquote: ['class', 'style'],
+      div: ['class', 'style'],
+      figure: ['class', 'style'],
+      figcaption: ['class', 'style'],
+      h1: ['class', 'style'],
+      h2: ['class', 'style'],
+      h3: ['class', 'style'],
+      h4: ['class', 'style'],
+      h5: ['class', 'style'],
+      h6: ['class', 'style'],
+      img: ['src', 'alt', 'title', 'width', 'height', 'class', 'style', 'loading', 'decoding'],
+      col: ['class', 'style', 'span', 'width'],
+      colgroup: ['class', 'style', 'span'],
+      li: ['class', 'style'],
+      ol: ['class', 'style', 'start'],
+      p: ['class', 'style'],
+      pre: ['class', 'style'],
+      span: ['class', 'style'],
+      table: ['class', 'style'],
+      td: ['class', 'style', 'colspan', 'rowspan'],
+      th: ['class', 'style', 'colspan', 'rowspan', 'scope'],
+      tr: ['class', 'style'],
+      ul: ['class', 'style']
+    };
+    var allowed = allowedAttributes[tagName] || [];
+    if (!allowed.length) {
+      return '';
+    }
+
+    if (tagName === 'img') {
+      var srcMatch = String(attrText || '').match(/\bsrc\s*=\s*("([^"]*)"|'([^']*)'|([^\s"'>/=`]+))/i);
+      var srcValue = srcMatch ? String(srcMatch[2] !== undefined ? srcMatch[2] : srcMatch[3] !== undefined ? srcMatch[3] : srcMatch[4] !== undefined ? srcMatch[4] : '').trim() : '';
+      if (!srcValue || !/^(?:https?:\/\/|\/media\/|\/assets\/|\/[^/]|data:image\/)/i.test(srcValue)) {
+        return '';
+      }
+    }
+
+    var attrs = [];
+    String(attrText || '').replace(/([a-zA-Z0-9:-]+)(?:\s*=\s*("([^"]*)"|'([^']*)'|([^\s"'>/=`]+)))?/g, function (_full, key, _valuePart, doubleQuoted, singleQuoted, bareValue) {
+      var lowerKey = String(key || '').toLowerCase();
+      if (allowed.indexOf(lowerKey) === -1) {
+        return '';
+      }
+
+      var value = doubleQuoted !== undefined ? doubleQuoted : singleQuoted !== undefined ? singleQuoted : bareValue !== undefined ? bareValue : '';
+      if (lowerKey === 'href' && /^(?:\s*javascript:|\s*data:)/i.test(String(value || ''))) {
+        return '';
+      }
+      if (lowerKey === 'style' && /(?:expression\s*\(|javascript:|url\s*\()/i.test(String(value || ''))) {
+        return '';
+      }
+      if (lowerKey === 'target') {
+        var targetValue = String(value || '').trim();
+        if (targetValue === '_blank') {
+          attrs.push(' target="_blank"');
+          if (attrs.indexOf(' rel="noreferrer noopener"') === -1) {
+            attrs.push(' rel="noreferrer noopener"');
+          }
+          return '';
+        }
+      }
+      attrs.push(' ' + lowerKey + '="' + escapeHtml(value) + '"');
+      return '';
+    });
+
+    return attrs.join('');
   }
 
   function sanitizeTagAttributes(tagName, attrText) {
@@ -64,6 +165,7 @@
       pre: ['class', 'style'],
       span: ['class', 'style'],
       table: ['class', 'style'],
+      img: ['src', 'alt', 'title', 'width', 'height', 'class', 'style', 'loading', 'decoding'],
       td: ['class', 'style', 'colspan', 'rowspan'],
       th: ['class', 'style', 'colspan', 'rowspan', 'scope'],
       tr: ['class', 'style'],
@@ -844,6 +946,7 @@
     escapeHtml: escapeHtml,
     sanitizePreviewHtml: sanitizePreviewHtml,
     sanitizeRichText: sanitizeRichText,
+    sanitizeRichTextAttributes: sanitizeRichTextAttributes,
     sanitizeFontFamily: sanitizeFontFamily,
     sanitizeTextColor: sanitizeTextColor,
     normalizeAcceptList: normalizeAcceptList,