diff --git a/advisories/github-reviewed/2025/06/GHSA-v9m8-9xxp-q492/GHSA-v9m8-9xxp-q492.json b/advisories/github-reviewed/2025/06/GHSA-v9m8-9xxp-q492/GHSA-v9m8-9xxp-q492.json
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+++ b/advisories/github-reviewed/2025/06/GHSA-v9m8-9xxp-q492/GHSA-v9m8-9xxp-q492.json
@@ -0,0 +1,65 @@
+{
+  "schema_version": "1.4.0",
+  "id": "GHSA-v9m8-9xxp-q492",
+  "modified": "2025-06-04T20:31:39Z",
+  "published": "2025-06-04T20:31:39Z",
+  "aliases": [
+    "CVE-2025-48951"
+  ],
+  "summary": "Auth0-PHP SDK Deserialization of Untrusted Data vulnerability",
+  "details": "**Overview**\nThe Auth0 PHP SDK contains a vulnerability due to insecure deserialization of cookie data. If exploited, since SDKs process cookie content without prior authentication, a threat actor could send a specially crafted cookie containing malicious serialized data.\n\n**Am I Affected?**\nYou are affected by this vulnerability if you meet the following preconditions:\n\n1. Applications using the Auth0-PHP SDK, versions between 8.0.0-BETA3 to 8.3.0. \n2. Applications using the following SDKs that rely on the Auth0-PHP SDK versions between 8.0.0-BETA3 to 8.3.0:\n    a. Auth0/symfony,\n    b. Auth0/laravel-auth0,\n    c. Auth0/wordpress.\n\n**Fix**\nUpgrade Auth0/Auth0-PHP to 8.3.1.\n\n**Acknowledgement**\nOkta would like to thank Andreas Forsblom for discovering this vulnerability.",
+  "severity": [
+    {
+      "type": "CVSS_V4",
+      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:H/SI:H/SA:H"
+    }
+  ],
+  "affected": [
+    {
+      "package": {
+        "ecosystem": "Packagist",
+        "name": "auth0/auth0-php"
+      },
+      "ranges": [
+        {
+          "type": "ECOSYSTEM",
+          "events": [
+            {
+              "introduced": "8.0.0-BETA3"
+            },
+            {
+              "fixed": "8.3.1"
+            }
+          ]
+        }
+      ]
+    }
+  ],
+  "references": [
+    {
+      "type": "WEB",
+      "url": "https://github.com/auth0/auth0-PHP/security/advisories/GHSA-v9m8-9xxp-q492"
+    },
+    {
+      "type": "ADVISORY",
+      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-48951"
+    },
+    {
+      "type": "WEB",
+      "url": "https://github.com/auth0/auth0-PHP/commit/04b1f5daa8bdfebc5e740ec5ca0fb2df1648a715"
+    },
+    {
+      "type": "PACKAGE",
+      "url": "https://github.com/auth0/auth0-PHP"
+    }
+  ],
+  "database_specific": {
+    "cwe_ids": [
+      "CWE-502"
+    ],
+    "severity": "CRITICAL",
+    "github_reviewed": true,
+    "github_reviewed_at": "2025-06-04T20:31:39Z",
+    "nvd_published_at": "2025-06-03T21:15:21Z"
+  }
+}
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