CVE-2025-66306

Summary

An IDOR (Insecure Direct Object Reference) vulnerability in the Grav CMS Admin Panel allows low-privilege users to access sensitive information from other accounts.
Although 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.

Details

• Endpoint: /admin/accounts/users/{username}
• Tested Version: Grav Admin 1.7.48
• Affected Accounts: Authenticated users with 0 privileges (non-privileged accounts)

Description:
Requesting another user’s account details (e.g., /admin/accounts/users/admin) as a low-privilege user returns an HTTP 403 Forbidden response.
However, sensitive information such as the admin’s email address is still present in the response source, specifically in the <title> tag.

system/src/Grav/Common/Flex/Types/Users/UserCollection.php

system/blueprints/flex/user-accounts.yaml

This is a classic IDOR vulnerability, where object references (usernames) are not properly protected from unauthorized enumeration.

PoC

1. Log in as a non-privileged user (0-privilege account).

2. Access another user’s endpoint, for example:

   GET /admin/accounts/users/admin
   

3. Observe the HTTP 403 Forbidden response.

4. Inspect the page source; sensitive data such as the admin email can be seen in the <title> tag.

PoC Video:

https://drive.google.com/file/d/1lY_qwqSkN5sPNmHvXGOk6R1mdIgVt71H/view

Impact

• Type: Information Disclosure via IDOR
• Who is impacted: Low-privilege authenticated users can enumerate other accounts and extract sensitive metadata (admin emails).
• Risk: Exposed information can be used for targeted phishing, credential stuffing, brute-force attacks, or social engineering campaigns.
• 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.

Disclosure & CVE Request

• We request a CVE ID for this vulnerability once validated.

• Please credit the discovery to:

  • Elvin Nuruyev
  • Kanan Farzalili

CVE-2025-66306 has a CVSS score of 4.3 (Medium). The vector is network-reachable, low privileges required, and no user interaction. A CVSS score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether this affects your application depends on whether the vulnerable code is present and reachable in your environment. A fixed version is available (1.8.0-beta.27); upgrading removes the vulnerable code path.

Kodem intelligence

1. What is CVE-2025-66306? CVE-2025-66306 is a medium-severity security vulnerability in getgrav/grav (composer), affecting versions < 1.8.0-beta.27. It is fixed in 1.8.0-beta.27.
2. How severe is CVE-2025-66306? CVE-2025-66306 has a CVSS score of 4.3 (Medium). This score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether it represents real risk in your environment depends on whether the vulnerable code is present and reachable.
3. Which versions of getgrav/grav are affected by CVE-2025-66306? getgrav/grav (composer) versions < 1.8.0-beta.27 is affected.
4. Is there a fix for CVE-2025-66306? Yes. CVE-2025-66306 is fixed in 1.8.0-beta.27. Upgrade to this version or later.
5. Is CVE-2025-66306 exploitable, and should I be worried? Whether CVE-2025-66306 is exploitable in your environment depends on whether the vulnerable code is present and reachable. A CVSS score is a worst-case rating; it does not account for your specific deployment, configuration, or usage patterns. Kodem, an Intelligent Application Security platform, uses runtime intelligence to show which vulnerabilities actually execute in production, so you can focus on the ones that represent real risk. Get a demo
6. What actually determines whether CVE-2025-66306 is exploitable, and how bad it is? Exploitability and impact are not fixed properties of a CVE. They depend on runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A high CVSS score on a dependency that never runs is not the same as real risk. Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter.
7. How do I fix CVE-2025-66306? Upgrade getgrav/grav to 1.8.0-beta.27 or later.