diff --git a/src/editors/sharedComponents/TinyMceWidget/hooks.js b/src/editors/sharedComponents/TinyMceWidget/hooks.js
index 3730e809b5..da5ed263d3 100644
--- a/src/editors/sharedComponents/TinyMceWidget/hooks.js
+++ b/src/editors/sharedComponents/TinyMceWidget/hooks.js
@@ -362,6 +362,7 @@ export const editorConfig = ({
       valid_children: '+body[style]',
       valid_elements: '*[*]',
       entity_encoding: 'utf-8',
+      protect: [/\<script[^>]*\/\>/g], // protect self-closing script tags from being mangled
     },
   };
 };