diff --git a/2021/39xxx/CVE-2021-39169.json b/2021/39xxx/CVE-2021-39169.json
index 8a86bed2ced..b36b5a638bc 100644
--- a/2021/39xxx/CVE-2021-39169.json
+++ b/2021/39xxx/CVE-2021-39169.json
@@ -1,18 +1,88 @@
 {
-    "data_type": "CVE",
-    "data_format": "MITRE",
-    "data_version": "4.0",
     "CVE_data_meta": {
+        "ASSIGNER": "security-advisories@github.com",
         "ID": "CVE-2021-39169",
-        "ASSIGNER": "cve@mitre.org",
-        "STATE": "RESERVED"
+        "STATE": "PUBLIC",
+        "TITLE": "XSS vulnerability using dialog"
     },
+    "affects": {
+        "vendor": {
+            "vendor_data": [
+                {
+                    "product": {
+                        "product_data": [
+                            {
+                                "product_name": "misskey",
+                                "version": {
+                                    "version_data": [
+                                        {
+                                            "version_value": "< 12.51.0"
+                                        }
+                                    ]
+                                }
+                            }
+                        ]
+                    },
+                    "vendor_name": "misskey-dev"
+                }
+            ]
+        }
+    },
+    "data_format": "MITRE",
+    "data_type": "CVE",
+    "data_version": "4.0",
     "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."
+                "value": "Misskey is a decentralized microblogging platform. In versions of Misskey prior to 12.51.0, malicious actors can use the web client built-in dialog to display a malicious string, leading to cross-site scripting (XSS). XSS could compromise the API request token. This issue has been fixed in version 12.51.0. There are no known workarounds aside from upgrading."
             }
         ]
+    },
+    "impact": {
+        "cvss": {
+            "attackComplexity": "LOW",
+            "attackVector": "NETWORK",
+            "availabilityImpact": "HIGH",
+            "baseScore": 8.0,
+            "baseSeverity": "HIGH",
+            "confidentialityImpact": "HIGH",
+            "integrityImpact": "HIGH",
+            "privilegesRequired": "LOW",
+            "scope": "UNCHANGED",
+            "userInteraction": "REQUIRED",
+            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H",
+            "version": "3.1"
+        }
+    },
+    "problemtype": {
+        "problemtype_data": [
+            {
+                "description": [
+                    {
+                        "lang": "eng",
+                        "value": "CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')"
+                    }
+                ]
+            }
+        ]
+    },
+    "references": {
+        "reference_data": [
+            {
+                "name": "https://github.com/misskey-dev/misskey/security/advisories/GHSA-pmmv-jwqh-f5ww",
+                "refsource": "CONFIRM",
+                "url": "https://github.com/misskey-dev/misskey/security/advisories/GHSA-pmmv-jwqh-f5ww"
+            },
+            {
+                "name": "https://github.com/misskey-dev/misskey/commit/ec203f7f795766f76b55fecc9248168c1cdf6c99",
+                "refsource": "MISC",
+                "url": "https://github.com/misskey-dev/misskey/commit/ec203f7f795766f76b55fecc9248168c1cdf6c99"
+            }
+        ]
+    },
+    "source": {
+        "advisory": "GHSA-pmmv-jwqh-f5ww",
+        "discovery": "UNKNOWN"
     }
 }
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