Overview
CVE-2025-66306 describes an Insecure Direct Object Reference (IDOR) vulnerability found in the Grav CMS Admin Panel. This flaw, present in versions prior to 1.8.0-beta.27, allows low-privilege users to access sensitive information belonging to other accounts. While direct account takeover isn’t possible, the exposure of admin email addresses and other metadata significantly increases the risk of phishing, credential stuffing, and social engineering attacks.
Technical Details
The IDOR vulnerability stems from insufficient access control checks within the Grav CMS Admin Panel. A low-privileged user can manipulate request parameters (likely IDs) to access data associated with other user accounts. This allows the attacker to bypass intended security measures and gain unauthorized access to sensitive information, such as user profiles, email addresses, and other metadata stored within the system. The root cause is that the application directly uses user-supplied input to access internal objects without proper authorization verification.
CVSS Analysis
- Severity: MEDIUM
- CVSS Score: 4.3
A CVSS score of 4.3 indicates a medium severity. This is primarily because the vulnerability requires a relatively low skill level to exploit and impacts confidentiality. While it doesn’t grant direct account control, the exposed information can be leveraged for further attacks.
Possible Impact
The exploitation of CVE-2025-66306 can lead to the following potential impacts:
- Phishing Attacks: Exposed email addresses can be used to craft targeted phishing campaigns against administrators and other users.
- Credential Stuffing: Leaked metadata may contain information valuable for credential stuffing attacks on other platforms.
- Social Engineering: Attackers can use the exposed information to build trust and manipulate users through social engineering tactics.
- Data Leakage: Sensitive metadata related to Grav CMS users is exposed to unauthorized individuals.
Mitigation & Patch Steps
The vulnerability is fixed in Grav CMS version 1.8.0-beta.27. The recommended mitigation step is to immediately update your Grav CMS installation to version 1.8.0-beta.27 or later. If you cannot update immediately, consider temporarily disabling the affected admin panel features or implementing stricter access control rules, although this may impact functionality.
- Update Grav CMS: The primary solution is to update to version 1.8.0-beta.27 or later.
- Review User Permissions: Ensure that user permissions are configured correctly and that users only have access to the resources they need.
- Monitor for Suspicious Activity: Monitor server logs for any unusual access patterns or attempts to access unauthorized resources.
