diff --git a/packages/react-dom/src/__tests__/escapeScriptForBrowser-test.js b/packages/react-dom/src/__tests__/escapeScriptForBrowser-test.js
new file mode 100644
index 0000000000000..681daf78bea37
--- /dev/null
+++ b/packages/react-dom/src/__tests__/escapeScriptForBrowser-test.js
@@ -0,0 +1,107 @@
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @emails react-core
+ */
+
+'use strict';
+
+let React;
+let ReactDOMFizzServer;
+let Stream;
+
+function getTestWritable() {
+  const writable = new Stream.PassThrough();
+  writable.setEncoding('utf8');
+  const output = {result: '', error: undefined};
+  writable.on('data', chunk => {
+    output.result += chunk;
+  });
+  writable.on('error', error => {
+    output.error = error;
+  });
+  const completed = new Promise(resolve => {
+    writable.on('finish', () => {
+      resolve();
+    });
+    writable.on('error', () => {
+      resolve();
+    });
+  });
+  return {writable, completed, output};
+}
+
+describe('escapeScriptForBrowser', () => {
+  beforeEach(() => {
+    jest.resetModules();
+    React = require('react');
+    ReactDOMFizzServer = require('react-dom/server');
+    Stream = require('stream');
+  });
+
+  it('"<[Ss]cript" strings are replaced with unicode escaped lowercase s or S depending on case', () => {
+    const {writable, output} = getTestWritable();
+    const {pipe} = ReactDOMFizzServer.renderToPipeableStream(<div />, {
+      bootstrapScriptContent:
+        '"prescription pre<scription preScription pre<Scription"',
+    });
+    pipe(writable);
+    jest.runAllTimers();
+    expect(output.result).toMatch(
+      '<div></div><script>"prescription pre<\\u0073cription preScription pre<\\u0053cription"</script>',
+    );
+  });
+
+  it('"</[Ss]cript" strings are replaced with encoded lowercase s or S depending on case', () => {
+    const {writable, output} = getTestWritable();
+    const {pipe} = ReactDOMFizzServer.renderToPipeableStream(<div />, {
+      bootstrapScriptContent:
+        '"prescription pre</scription preScription pre</Scription"',
+    });
+    pipe(writable);
+    jest.runAllTimers();
+    expect(output.result).toMatch(
+      '<div></div><script>"prescription pre</\\u0073cription preScription pre</\\u0053cription"</script>',
+    );
+  });
+
+  it('"[Ss]cript", "/[Ss]cript", "<[Ss]crip", "</[Ss]crip" strings are not escaped', () => {
+    const {writable, output} = getTestWritable();
+    const {pipe} = ReactDOMFizzServer.renderToPipeableStream(<div />, {
+      bootstrapScriptContent:
+        '"Script script /Script /script <Scrip <scrip </Scrip </scrip"',
+    });
+    pipe(writable);
+    jest.runAllTimers();
+    expect(output.result).toMatch(
+      '<div></div><script>"Script script /Script /script <Scrip <scrip </Scrip </scrip"</script>',
+    );
+  });
+
+  it('matches case insensitively', () => {
+    const {writable, output} = getTestWritable();
+    const {pipe} = ReactDOMFizzServer.renderToPipeableStream(<div />, {
+      bootstrapScriptContent: '"<sCrIpT <ScripT </scrIPT </SCRIpT"',
+    });
+    pipe(writable);
+    jest.runAllTimers();
+    expect(output.result).toMatch(
+      '<div></div><script>"<\\u0073CrIpT <\\u0053cripT </\\u0073crIPT </\\u0053CRIpT"</script>',
+    );
+  });
+
+  it('does not escape <, >, &, \\u2028, or \\u2029 characters', () => {
+    const {writable, output} = getTestWritable();
+    const {pipe} = ReactDOMFizzServer.renderToPipeableStream(<div />, {
+      bootstrapScriptContent: '"<, >, &, \u2028, or \u2029"',
+    });
+    pipe(writable);
+    jest.runAllTimers();
+    expect(output.result).toMatch(
+      '<div></div><script>"<, >, &, \u2028, or \u2029"</script>',
+    );
+  });
+});
diff --git a/packages/react-dom/src/server/ReactDOMServerFormatConfig.js b/packages/react-dom/src/server/ReactDOMServerFormatConfig.js
index a42cb3188722b..7b618fd601573 100644
--- a/packages/react-dom/src/server/ReactDOMServerFormatConfig.js
+++ b/packages/react-dom/src/server/ReactDOMServerFormatConfig.js
@@ -52,6 +52,7 @@ import {validateProperties as validateUnknownProperties} from '../shared/ReactDO
 import warnValidStyle from '../shared/warnValidStyle';
 
 import escapeTextForBrowser from './escapeTextForBrowser';
+import escapeScriptForBrowser from './escapeScriptForBrowser';
 import hyphenateStyleName from '../shared/hyphenateStyleName';
 import hasOwnProperty from 'shared/hasOwnProperty';
 import sanitizeURL from '../shared/sanitizeURL';
@@ -102,7 +103,7 @@ export function createResponseState(
   if (bootstrapScriptContent !== undefined) {
     bootstrapChunks.push(
       inlineScriptWithNonce,
-      stringToChunk(escapeTextForBrowser(bootstrapScriptContent)),
+      stringToChunk(escapeScriptForBrowser(bootstrapScriptContent)),
       endInlineScript,
     );
   }
diff --git a/packages/react-dom/src/server/escapeScriptForBrowser.js b/packages/react-dom/src/server/escapeScriptForBrowser.js
new file mode 100644
index 0000000000000..fb79e190014f7
--- /dev/null
+++ b/packages/react-dom/src/server/escapeScriptForBrowser.js
@@ -0,0 +1,37 @@
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+import {checkHtmlStringCoercion} from 'shared/CheckStringCoercion';
+
+const scriptRegex = /(<\/|<)(s)(cript)/gi;
+const scriptReplacer = (match, prefix, s, suffix) =>
+  `${prefix}${subsitutions[s]}${suffix}`;
+const subsitutions = {
+  s: '\\u0073',
+  S: '\\u0053',
+};
+
+/**
+ * Escapes javascript for embedding into HTML.
+ *
+ * @param {*} scriptText Text value to escape.
+ * @return {string} An escaped string.
+ */
+function escapeScriptForBrowser(scriptText) {
+  if (typeof scriptText === 'boolean' || typeof scriptText === 'number') {
+    // this shortcircuit helps perf for types that we know will never have
+    // special characters, especially given that this function is used often
+    // for numeric dom ids.
+    return '' + scriptText;
+  }
+  if (__DEV__) {
+    checkHtmlStringCoercion(scriptText);
+  }
+  return ('' + scriptText).replace(scriptRegex, scriptReplacer);
+}
+
+export default escapeScriptForBrowser;