CVE-2025-66306: Getgrav/grav Grav Vulnerable To Information Disclosure Vulnerability

{
  "schema_version" : "1.4.0",
  "id" : "GHSA-4cwq-j7jv-qmwg",
  "modified" : "2025-12-02T00:39:01Z",
  "published" : "2025-12-02T00:39:01Z",
  "aliases" : [ "CVE-2025-66306" ],
  "summary" : "Grav vulnerable to Information Disclosure via IDOR in Grav Admin Panel",
  "details" : "## **Summary**\n\nAn **IDOR (Insecure Direct Object Reference)** vulnerability in the Grav CMS Admin Panel allows **low-privilege users to access sensitive information** from other accounts.\nAlthough direct account takeover is not possible, **admin email addresses and other metadata can be exposed**, increasing the risk of phishing, credential stuffing, and social engineering.\n\n---\n\n## **Details**\n\n* **Endpoint:** `/admin/accounts/users/{username}`\n* **Tested Version:** Grav Admin 1.7.48\n* **Affected Accounts:** Authenticated users with **0 privileges** (non-privileged accounts)\n\n**Description:**\nRequesting another user’s account details (e.g., `/admin/accounts/users/admin`) as a low-privilege user returns an HTTP **403 Forbidden** response.\nHowever, sensitive information such as the **admin’s email address** is still present in the **response source**, specifically in the `<title>` tag.\n\n**system/src/Grav/Common/Flex/Types/Users/UserCollection.php**\n<img width=\"700\" height=\"327\" alt=\"Screenshot 2025-08-24 021027\" src=\"https://github.com/user-attachments/assets/7e69ae49-d8fc-442f-b00c-9efaec706b2e\" />\n\n**system/blueprints/flex/user-accounts.yaml**\n<img width=\"700\" height=\"300\" alt=\"Screenshot 2025-08-24 020521\" src=\"https://github.com/user-attachments/assets/756631c8-d60b-4b84-a08a-2a9c2f81b41f\" />\n\n\nThis is a classic **IDOR vulnerability**, where object references (usernames) are not properly protected from unauthorized enumeration.\n\n---\n\n## **PoC**\n\n1. Log in as a **non-privileged user** (0-privilege account).\n2. Access another user’s endpoint, for example:\n\n   ```\n   GET /admin/accounts/users/admin\n   ```\n3. Observe the HTTP **403 Forbidden** response.\n4. Inspect the **page source**; sensitive data such as the **admin email** can be seen in the `<title>` tag.\n\n**PoC Video:** \n\n[https://drive.google.com/file/d/1lY_qwqSkN5sPNmHvXGOk6R1mdIgVt71H/view](https://drive.google.com/file/d/1lY_qwqSkN5sPNmHvXGOk6R1mdIgVt71H/view)\n\n---\n\n## **Impact**\n\n* **Type:** Information Disclosure via IDOR\n* **Who is impacted:** Low-privilege authenticated users can enumerate other accounts and extract sensitive metadata (admin emails).\n* **Risk:** Exposed information can be used for targeted phishing, credential stuffing, brute-force attacks, or social engineering campaigns.\n* **Severity Justification:** Only a low-privilege account is required, and sensitive metadata is leaked. Arbitrary code execution is not possible, but the information exposure is **moderate risk**.\n\n---\n\n## **Disclosure & CVE Request**\n\n* We request a **CVE ID** for this vulnerability once validated.\n* Please credit the discovery to:\n\n  * **Elvin Nuruyev**\n  * **Kanan Farzalili**",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "getgrav/grav"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "1.8.0-beta.27"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/getgrav/grav/security/advisories/GHSA-4cwq-j7jv-qmwg"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2025-66306"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/getgrav/grav/commit/b7e1958a6e807ac14919447b60e5204a2ea77f62"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/getgrav/grav"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-639" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2025-12-02T00:39:01Z",
    "nvd_published_at" : "2025-12-01T22:15:50Z"
  }
}