diff --git a/modules/apps/client-extension/client-extension-web/src/main/java/com/liferay/client/extension/web/internal/portlet/IFrameCETPortlet.java b/modules/apps/client-extension/client-extension-web/src/main/java/com/liferay/client/extension/web/internal/portlet/IFrameCETPortlet.java
index bb5b7ebba750b6..556af6a38afbe5 100644
--- a/modules/apps/client-extension/client-extension-web/src/main/java/com/liferay/client/extension/web/internal/portlet/IFrameCETPortlet.java
+++ b/modules/apps/client-extension/client-extension-web/src/main/java/com/liferay/client/extension/web/internal/portlet/IFrameCETPortlet.java
@@ -6,12 +6,14 @@
 package com.liferay.client.extension.web.internal.portlet;
 
 import com.liferay.client.extension.type.IFrameCET;
+import com.liferay.petra.string.CharPool;
 import com.liferay.petra.string.StringBundler;
 import com.liferay.portal.kernel.servlet.taglib.util.OutputData;
 import com.liferay.portal.kernel.util.HashMapDictionaryBuilder;
 import com.liferay.portal.kernel.util.HttpComponentsUtil;
 import com.liferay.portal.kernel.util.LocaleUtil;
 import com.liferay.portal.kernel.util.Portal;
+import com.liferay.portal.kernel.util.StringUtil;
 import com.liferay.portal.kernel.util.WebKeys;
 
 import java.io.IOException;
@@ -81,13 +83,18 @@ public void render(
 
 		printWriter.print("<iframe src=\"");
 
-		String iFrameURL = cet.getURL();
+		String iFrameURL = StringUtil.replace(
+			cet.getURL(), CharPool.QUOTE, _ENCODED_DOUBLE_QUOTE);
 
 		Properties properties = getProperties(renderRequest);
 
 		for (Map.Entry<Object, Object> entry : properties.entrySet()) {
 			iFrameURL = HttpComponentsUtil.addParameter(
-				iFrameURL, (String)entry.getKey(), (String)entry.getValue());
+				iFrameURL,
+				StringUtil.replace(
+					(String)entry.getKey(), CharPool.QUOTE,
+					_ENCODED_DOUBLE_QUOTE),
+				(String)entry.getValue());
 		}
 
 		printWriter.print(iFrameURL);
@@ -97,6 +104,8 @@ public void render(
 		printWriter.flush();
 	}
 
+	private static final String _ENCODED_DOUBLE_QUOTE = "%22";
+
 	private final Portal _portal;
 	private final String _portletId;
 
diff --git a/modules/apps/client-extension/client-extension-web/src/test/java/com/liferay/client/extension/web/internal/portlet/IFrameCETPortletTest.java b/modules/apps/client-extension/client-extension-web/src/test/java/com/liferay/client/extension/web/internal/portlet/IFrameCETPortletTest.java
new file mode 100644
index 00000000000000..2a07b21ed9b93c
--- /dev/null
+++ b/modules/apps/client-extension/client-extension-web/src/test/java/com/liferay/client/extension/web/internal/portlet/IFrameCETPortletTest.java
@@ -0,0 +1,104 @@
+/**
+ * SPDX-FileCopyrightText: (c) 2024 Liferay, Inc. https://liferay.com
+ * SPDX-License-Identifier: LGPL-2.1-or-later OR LicenseRef-Liferay-DXP-EULA-2.0.0-2023-06
+ */
+
+package com.liferay.client.extension.web.internal.portlet;
+
+import com.liferay.client.extension.type.IFrameCET;
+import com.liferay.portal.kernel.util.Portal;
+import com.liferay.portal.kernel.util.PortalUtil;
+import com.liferay.portal.test.rule.LiferayUnitTestRule;
+import com.liferay.portal.util.PortalImpl;
+import com.liferay.portletmvc4spring.test.mock.web.portlet.MockPortletPreferences;
+
+import java.io.CharArrayWriter;
+import java.io.IOException;
+import java.io.PrintWriter;
+
+import java.util.Properties;
+
+import javax.portlet.RenderRequest;
+import javax.portlet.RenderResponse;
+
+import org.junit.Assert;
+import org.junit.Before;
+import org.junit.ClassRule;
+import org.junit.Rule;
+import org.junit.Test;
+
+import org.mockito.Mockito;
+
+/**
+ * @author Iván Zaera Avellón
+ */
+public class IFrameCETPortletTest {
+
+	@ClassRule
+	@Rule
+	public static final LiferayUnitTestRule liferayUnitTestRule =
+		LiferayUnitTestRule.INSTANCE;
+
+	@Before
+	public void setUp() {
+		_portal = new PortalImpl();
+
+		new PortalUtil(
+		).setPortal(
+			_portal
+		);
+	}
+
+	@Test
+	public void testRenderWithQuotedProperties() throws IOException {
+		IFrameCET iFrameCET = Mockito.mock(IFrameCET.class);
+
+		Properties properties = new Properties();
+
+		properties.put("\"height", "399\"");
+
+		Mockito.when(
+			iFrameCET.getProperties()
+		).thenReturn(
+			properties
+		);
+
+		Mockito.when(
+			iFrameCET.getURL()
+		).thenReturn(
+			"https://example.com"
+		);
+
+		IFrameCETPortlet iFrameCETPortlet = new IFrameCETPortlet(
+			iFrameCET, "portletId", _portal);
+
+		RenderRequest renderRequest = Mockito.mock(RenderRequest.class);
+
+		Mockito.when(
+			renderRequest.getPreferences()
+		).thenReturn(
+			new MockPortletPreferences()
+		);
+
+		RenderResponse renderResponse = Mockito.mock(RenderResponse.class);
+
+		CharArrayWriter charArrayWriter = new CharArrayWriter();
+
+		PrintWriter printWriter = new PrintWriter(charArrayWriter);
+
+		Mockito.when(
+			renderResponse.getWriter()
+		).thenReturn(
+			printWriter
+		);
+
+		iFrameCETPortlet.render(renderRequest, renderResponse);
+
+		Assert.assertEquals(
+			"<iframe src=\"https://example.com?%22height=399%22\"></iframe>",
+			charArrayWriter.toString());
+	}
+
+	private Portal _portal;
+
+}
\ No newline at end of file