diff --git a/public/components/panels/settings/lib/customJavascript/component.js b/public/components/panels/settings/lib/customJavascript/component.js
index 0a80c5cc2e..0deef700e5 100644
--- a/public/components/panels/settings/lib/customJavascript/component.js
+++ b/public/components/panels/settings/lib/customJavascript/component.js
@@ -3,6 +3,8 @@ import ScriptControl from './control'
 import HtmlEditor from './htmlEditor'
 import { getStorage, getService } from 'vc-cake'
 import Tooltip from '../../../../tooltip/tooltip'
+import store from 'public/editor/stores/store'
+import { notificationAdded } from 'public/editor/stores/notifications/slice'
 
 const dataManager = getService('dataManager')
 const roleManager = getService('roleManager')
@@ -60,6 +62,15 @@ export default class CustomJavascript extends React.Component {
   }
 
   updateSettings (key, value) {
+    const regex = /document\.write\s*\(/
+    if (regex.test(value)) {
+      store.dispatch(notificationAdded({
+        text: CustomJavascript.localizations.documentWriteWarning,
+        html: true,
+        time: 15000
+      }))
+      return false
+    }
     settingsStorage.state(key).set(value)
     this.setState({ [key]: value })
   }
diff --git a/public/components/wpVcSettings/dashboard.js b/public/components/wpVcSettings/dashboard.js
index 8c7393c722..b95cad3e2a 100644
--- a/public/components/wpVcSettings/dashboard.js
+++ b/public/components/wpVcSettings/dashboard.js
@@ -8,6 +8,7 @@ window.ResizeSensor = ResizeSensorModule
 const dataManager = getService('dataManager')
 const localizations = dataManager.get('localizations')
 const unsavedChangesText = localizations && localizations.unsavedChangesText ? localizations.unsavedChangesText : 'Changes may not be saved.'
+const documentWriteWarning = localizations && localizations.documentWriteWarningSettings ? localizations.documentWriteWarningSettings : 'Avoiding using document.write as per MDN documentation. This may result in editor not working properly.'
 
 export const dashboard = () => {
   const dashboardContainer = document.querySelector('.vcv-settings')
@@ -108,6 +109,12 @@ export const dashboard = () => {
     }
     const submitButtonContainer = e.target.querySelector('.vcv-submit-button-container')
     const submitButton = e.target.querySelector('.vcv-dashboard-button--save')
+    if (submitButton.id === 'submit_btn-vcv-global-css-js') {
+      const isValid = isValidEditorsValue()
+      if (!isValid) {
+        alert(documentWriteWarning)
+      }
+    }
     // this will get all form fields and encode it as a string
     const data = Array.from(
       new window.FormData(e.target),
@@ -156,6 +163,15 @@ export const dashboard = () => {
     window.jQuery(dataCollectionTableWrapper).slideToggle()
   }
 
+  const isValidEditorsValue = () => {
+    const regex = /document\.write\s*\(/
+    const headerEditorValue = window.vcvGlobalJsHeadEditor.getValue().trim()
+    const footerEditorValue = window.vcvGlobalJsFooterEditor.getValue().trim()
+    const isValidHeadeEditor = headerEditorValue ? !regex.test(headerEditorValue) : true
+    const isValidFooterEditor = footerEditorValue ? !regex.test(footerEditorValue) : true
+    return isValidFooterEditor && isValidHeadeEditor
+  }
+
   if (dataCollectionTableWrapper) {
     if (urlHash.indexOf(dataCollectionTableWrapper.id) !== -1) {
       dataCollectionTableWrapper.style.display = 'block'
diff --git a/public/components/wpVcSettings/editors.js b/public/components/wpVcSettings/editors.js
index 5ef6e7d39a..c742f649c3 100644
--- a/public/components/wpVcSettings/editors.js
+++ b/public/components/wpVcSettings/editors.js
@@ -50,16 +50,16 @@ export const initEditors = () => {
    */
   const globalJsHead = document.querySelector('#vcv-settingsGlobalJsHead')
   if (globalJsHead !== null) {
-    const globalJsHeadEditor = codeEditor.getEditor(globalJsHead, 'text/html', globalJsHead.value)
-    globalJsHeadEditor.on('change', async () => {
+    window.vcvGlobalJsHeadEditor = codeEditor.getEditor(globalJsHead, 'text/html', globalJsHead.value)
+    window.vcvGlobalJsHeadEditor.on('change', async () => {
       setStatus('ready')
     })
   }
 
   const globalJsFooter = document.querySelector('#vcv-settingsGlobalJsFooter')
   if (globalJsFooter !== null) {
-    const globalJsFooterEditor = codeEditor.getEditor(globalJsFooter, 'text/html', globalJsFooter.value)
-    globalJsFooterEditor.on('change', async () => {
+    window.vcvGlobalJsFooterEditor = codeEditor.getEditor(globalJsFooter, 'text/html', globalJsFooter.value)
+    window.vcvGlobalJsFooterEditor.on('change', async () => {
       setStatus('ready')
     })
   }
diff --git a/visualcomposer/Helpers/Localizations.php b/visualcomposer/Helpers/Localizations.php
index 5d6b8b7c93..0ef90e501d 100644
--- a/visualcomposer/Helpers/Localizations.php
+++ b/visualcomposer/Helpers/Localizations.php
@@ -2291,6 +2291,14 @@ public function getLocalizations()
                 'Logo is not set. Please set a logo.',
                 'visualcomposer'
             ),
+            'documentWriteWarning' => __(
+                'Warning: Custom JavaScript won\'t be saved. Avoid using document.write() as it can break the editor. Please refer to the <a href="https://developer.mozilla.org/en-US/docs/Web/API/Document/write" target="_blank" rel="noopener noreferrer">MDN documentation</a> for more info.',
+                'visualcomposer'
+            ),
+            'documentWriteWarningSettings' => __(
+                'Avoiding using document.write as per MDN documentation. This may result in editor not working properly.',
+                'visualcomposer'
+            ),
         ];
 
         return vcfilter('vcv:helpers:localizations:i18n', $locale);