diff --git a/2017/18xxx/CVE-2017-18359.json b/2017/18xxx/CVE-2017-18359.json
index 626d8e16a89..b3b10f515d1 100644
--- a/2017/18xxx/CVE-2017-18359.json
+++ b/2017/18xxx/CVE-2017-18359.json
@@ -71,6 +71,11 @@
                 "name": "https://trac.osgeo.org/postgis/ticket/3704",
                 "refsource": "MISC",
                 "url": "https://trac.osgeo.org/postgis/ticket/3704"
+            },
+            {
+                "refsource": "MLIST",
+                "name": "[debian-lts-announce] 20211227 [SECURITY] [DLA 2857-1] postgis security update",
+                "url": "https://lists.debian.org/debian-lts-announce/2021/12/msg00020.html"
             }
         ]
     }
diff --git a/2021/45xxx/CVE-2021-45907.json b/2021/45xxx/CVE-2021-45907.json
new file mode 100644
index 00000000000..d849b5b958e
--- /dev/null
+++ b/2021/45xxx/CVE-2021-45907.json
@@ -0,0 +1,18 @@
+{
+    "data_type": "CVE",
+    "data_format": "MITRE",
+    "data_version": "4.0",
+    "CVE_data_meta": {
+        "ID": "CVE-2021-45907",
+        "ASSIGNER": "cve@mitre.org",
+        "STATE": "RESERVED"
+    },
+    "description": {
+        "description_data": [
+            {
+                "lang": "eng",
+                "value": "** RESERVED ** This candidate has been reserved by an organization or individual that will use it when announcing a new security problem. When the candidate has been publicized, the details for this candidate will be provided."
+            }
+        ]
+    }
+}
\ No newline at end of file
diff --git a/2021/45xxx/CVE-2021-45908.json b/2021/45xxx/CVE-2021-45908.json
new file mode 100644
index 00000000000..2e2c336c2f3
--- /dev/null
+++ b/2021/45xxx/CVE-2021-45908.json
@@ -0,0 +1,18 @@
+{
+    "data_type": "CVE",
+    "data_format": "MITRE",
+    "data_version": "4.0",
+    "CVE_data_meta": {
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+        "ASSIGNER": "cve@mitre.org",
+        "STATE": "RESERVED"
+    },
+    "description": {
+        "description_data": [
+            {
+                "lang": "eng",
+                "value": "** RESERVED ** This candidate has been reserved by an organization or individual that will use it when announcing a new security problem. When the candidate has been publicized, the details for this candidate will be provided."
+            }
+        ]
+    }
+}
\ No newline at end of file
diff --git a/2021/45xxx/CVE-2021-45909.json b/2021/45xxx/CVE-2021-45909.json
new file mode 100644
index 00000000000..b4cc4533bad
--- /dev/null
+++ b/2021/45xxx/CVE-2021-45909.json
@@ -0,0 +1,18 @@
+{
+    "data_type": "CVE",
+    "data_format": "MITRE",
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+        "ID": "CVE-2021-45909",
+        "ASSIGNER": "cve@mitre.org",
+        "STATE": "RESERVED"
+    },
+    "description": {
+        "description_data": [
+            {
+                "lang": "eng",
+                "value": "** RESERVED ** This candidate has been reserved by an organization or individual that will use it when announcing a new security problem. When the candidate has been publicized, the details for this candidate will be provided."
+            }
+        ]
+    }
+}
\ No newline at end of file
diff --git a/2021/45xxx/CVE-2021-45910.json b/2021/45xxx/CVE-2021-45910.json
new file mode 100644
index 00000000000..76fb625710c
--- /dev/null
+++ b/2021/45xxx/CVE-2021-45910.json
@@ -0,0 +1,18 @@
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+    "data_type": "CVE",
+    "data_format": "MITRE",
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+        "ID": "CVE-2021-45910",
+        "ASSIGNER": "cve@mitre.org",
+        "STATE": "RESERVED"
+    },
+    "description": {
+        "description_data": [
+            {
+                "lang": "eng",
+                "value": "** RESERVED ** This candidate has been reserved by an organization or individual that will use it when announcing a new security problem. When the candidate has been publicized, the details for this candidate will be provided."
+            }
+        ]
+    }
+}
\ No newline at end of file
diff --git a/2021/45xxx/CVE-2021-45911.json b/2021/45xxx/CVE-2021-45911.json
new file mode 100644
index 00000000000..53796904431
--- /dev/null
+++ b/2021/45xxx/CVE-2021-45911.json
@@ -0,0 +1,18 @@
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+        "ID": "CVE-2021-45911",
+        "ASSIGNER": "cve@mitre.org",
+        "STATE": "RESERVED"
+    },
+    "description": {
+        "description_data": [
+            {
+                "lang": "eng",
+                "value": "** RESERVED ** This candidate has been reserved by an organization or individual that will use it when announcing a new security problem. When the candidate has been publicized, the details for this candidate will be provided."
+            }
+        ]
+    }
+}
\ No newline at end of file
diff --git a/2021/4xxx/CVE-2021-4181.json b/2021/4xxx/CVE-2021-4181.json
new file mode 100644
index 00000000000..8720b23b8a3
--- /dev/null
+++ b/2021/4xxx/CVE-2021-4181.json
@@ -0,0 +1,18 @@
+{
+    "data_type": "CVE",
+    "data_format": "MITRE",
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+        "ASSIGNER": "cve@mitre.org",
+        "STATE": "RESERVED"
+    },
+    "description": {
+        "description_data": [
+            {
+                "lang": "eng",
+                "value": "** RESERVED ** This candidate has been reserved by an organization or individual that will use it when announcing a new security problem. When the candidate has been publicized, the details for this candidate will be provided."
+            }
+        ]
+    }
+}
\ No newline at end of file
diff --git a/2021/4xxx/CVE-2021-4182.json b/2021/4xxx/CVE-2021-4182.json
new file mode 100644
index 00000000000..e566b58a9b6
--- /dev/null
+++ b/2021/4xxx/CVE-2021-4182.json
@@ -0,0 +1,18 @@
+{
+    "data_type": "CVE",
+    "data_format": "MITRE",
+    "data_version": "4.0",
+    "CVE_data_meta": {
+        "ID": "CVE-2021-4182",
+        "ASSIGNER": "cve@mitre.org",
+        "STATE": "RESERVED"
+    },
+    "description": {
+        "description_data": [
+            {
+                "lang": "eng",
+                "value": "** RESERVED ** This candidate has been reserved by an organization or individual that will use it when announcing a new security problem. When the candidate has been publicized, the details for this candidate will be provided."
+            }
+        ]
+    }
+}
\ No newline at end of file
diff --git a/2021/4xxx/CVE-2021-4183.json b/2021/4xxx/CVE-2021-4183.json
new file mode 100644
index 00000000000..87f30cb3ff4
--- /dev/null
+++ b/2021/4xxx/CVE-2021-4183.json
@@ -0,0 +1,18 @@
+{
+    "data_type": "CVE",
+    "data_format": "MITRE",
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+    "CVE_data_meta": {
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+        "ASSIGNER": "cve@mitre.org",
+        "STATE": "RESERVED"
+    },
+    "description": {
+        "description_data": [
+            {
+                "lang": "eng",
+                "value": "** RESERVED ** This candidate has been reserved by an organization or individual that will use it when announcing a new security problem. When the candidate has been publicized, the details for this candidate will be provided."
+            }
+        ]
+    }
+}
\ No newline at end of file
diff --git a/2021/4xxx/CVE-2021-4184.json b/2021/4xxx/CVE-2021-4184.json
new file mode 100644
index 00000000000..92bdfabc66b
--- /dev/null
+++ b/2021/4xxx/CVE-2021-4184.json
@@ -0,0 +1,18 @@
+{
+    "data_type": "CVE",
+    "data_format": "MITRE",
+    "data_version": "4.0",
+    "CVE_data_meta": {
+        "ID": "CVE-2021-4184",
+        "ASSIGNER": "cve@mitre.org",
+        "STATE": "RESERVED"
+    },
+    "description": {
+        "description_data": [
+            {
+                "lang": "eng",
+                "value": "** RESERVED ** This candidate has been reserved by an organization or individual that will use it when announcing a new security problem. When the candidate has been publicized, the details for this candidate will be provided."
+            }
+        ]
+    }
+}
\ No newline at end of file
diff --git a/2021/4xxx/CVE-2021-4185.json b/2021/4xxx/CVE-2021-4185.json
new file mode 100644
index 00000000000..423decb7ef6
--- /dev/null
+++ b/2021/4xxx/CVE-2021-4185.json
@@ -0,0 +1,18 @@
+{
+    "data_type": "CVE",
+    "data_format": "MITRE",
+    "data_version": "4.0",
+    "CVE_data_meta": {
+        "ID": "CVE-2021-4185",
+        "ASSIGNER": "cve@mitre.org",
+        "STATE": "RESERVED"
+    },
+    "description": {
+        "description_data": [
+            {
+                "lang": "eng",
+                "value": "** RESERVED ** This candidate has been reserved by an organization or individual that will use it when announcing a new security problem. When the candidate has been publicized, the details for this candidate will be provided."
+            }
+        ]
+    }
+}
\ No newline at end of file
diff --git a/2021/4xxx/CVE-2021-4186.json b/2021/4xxx/CVE-2021-4186.json
new file mode 100644
index 00000000000..498ddee69eb
--- /dev/null
+++ b/2021/4xxx/CVE-2021-4186.json
@@ -0,0 +1,18 @@
+{
+    "data_type": "CVE",
+    "data_format": "MITRE",
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+        "ASSIGNER": "cve@mitre.org",
+        "STATE": "RESERVED"
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+    "description": {
+        "description_data": [
+            {
+                "lang": "eng",
+                "value": "** RESERVED ** This candidate has been reserved by an organization or individual that will use it when announcing a new security problem. When the candidate has been publicized, the details for this candidate will be provided."
+            }
+        ]
+    }
+}
\ No newline at end of file