diff --git a/2021/45xxx/CVE-2021-45960.json b/2021/45xxx/CVE-2021-45960.json
new file mode 100644
index 00000000000..ffb77b30547
--- /dev/null
+++ b/2021/45xxx/CVE-2021-45960.json
@@ -0,0 +1,72 @@
+{
+    "CVE_data_meta": {
+        "ASSIGNER": "cve@mitre.org",
+        "ID": "CVE-2021-45960",
+        "STATE": "PUBLIC"
+    },
+    "affects": {
+        "vendor": {
+            "vendor_data": [
+                {
+                    "product": {
+                        "product_data": [
+                            {
+                                "product_name": "n/a",
+                                "version": {
+                                    "version_data": [
+                                        {
+                                            "version_value": "n/a"
+                                        }
+                                    ]
+                                }
+                            }
+                        ]
+                    },
+                    "vendor_name": "n/a"
+                }
+            ]
+        }
+    },
+    "data_format": "MITRE",
+    "data_type": "CVE",
+    "data_version": "4.0",
+    "description": {
+        "description_data": [
+            {
+                "lang": "eng",
+                "value": "In Expat (aka libexpat) before 2.4.3, a left shift by 29 (or more) places in the storeAtts function in xmlparse.c can lead to realloc misbehavior (e.g., allocating too few bytes, or only freeing memory)."
+            }
+        ]
+    },
+    "problemtype": {
+        "problemtype_data": [
+            {
+                "description": [
+                    {
+                        "lang": "eng",
+                        "value": "n/a"
+                    }
+                ]
+            }
+        ]
+    },
+    "references": {
+        "reference_data": [
+            {
+                "url": "https://github.com/libexpat/libexpat/issues/531",
+                "refsource": "MISC",
+                "name": "https://github.com/libexpat/libexpat/issues/531"
+            },
+            {
+                "url": "https://github.com/libexpat/libexpat/pull/534",
+                "refsource": "MISC",
+                "name": "https://github.com/libexpat/libexpat/pull/534"
+            },
+            {
+                "url": "https://bugzilla.mozilla.org/show_bug.cgi?id=1217609",
+                "refsource": "MISC",
+                "name": "https://bugzilla.mozilla.org/show_bug.cgi?id=1217609"
+            }
+        ]
+    }
+}
\ No newline at end of file