[14.0][FIX] document_page: Stored XSS

unitary tests added

post-migration script added

document_page/tests/test_document_page_content_sanitized.py

@@ -0,0 +1,24 @@
+from odoo.tests import common
+
+
+class TestDocumentContentSanitized(common.TransactionCase):
+    def setUp(self):
+        super(TestDocumentContentSanitized, self).setUp()
+        self.page_obj = self.env["document.page"]
+        self.category1 = self.env.ref("document_page.demo_category1")
+
+    def test_page_content_sanitized(self):
+        malicious_page = self.page_obj.create(
+            {
+                "name": "Malicious Page",
+                "parent_id": self.category1.id,
+                "content": "<p>Test content</p><script> alert(1)</script>",
+            }
+        )
+        self.assertEqual(malicious_page.content, "<p>Test content</p>")
+
+        malicious_page.write(
+            {"content": "<p>Test content</p><script> alert(1)</script>"}
+        )
+
+        self.assertEqual(malicious_page.content, "<p>Test content</p>")