What is the CVSS score of EUVD-2025-200285?

EUVD-2025-200285 has a CVSS 3.1 base score of 9.8 (Critical). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H. EPSS exploitation probability: 0.1%.

Which versions of Terminalfour are affected by EUVD-2025-200285?

A critical vulnerability in Terminalfour 8.0-8.4.1.1 allows Power Users to escalate their privileges to Administrator level and take control of other user accounts, including changing passwords.

How to fix or mitigate EUVD-2025-200285?

Within 24 hours: Identify all Terminalfour instances running versions 8.0–8.4.1.1 and audit Power User account activity logs for suspicious privilege modifications or password changes; disable Power User roles if not operationally critical. Within 7 days: Implement network-level access restrictions to Terminalfour user management functions and require multi-factor authentication for all administrative accounts; reset passwords for all Administrator accounts as a precaution. Within 30 days: Upgrade to a patched version when available (monitor vendor advisories) and conduct a full access control audit to verify no unauthorized privilege escalations occurred.

Terminalfour EUVD-2025-200285

| CVE-2025-58386 CRITICAL

Improper Authorization (CWE-285)

2025-12-02 cve@mitre.org

Authentication Bypass Terminalfour

9.8

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

9.8 CRITICAL

AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

EUVD ID Assigned

Mar 15, 2026 - 14:04 euvd

EUVD-2025-200285

Analysis Generated

Mar 15, 2026 - 14:04 vuln.today

CVE Published

Dec 02, 2025 - 18:15 nvd

CRITICAL 9.8

DescriptionCVE.org

In Terminalfour 8 through 8.4.1.1, the userLevel parameter in the user management function is not subject to proper server-side authorization checks. A Power User can intercept and modify this parameter to assign the Administrator role to other existing lower-privileged accounts, or invite a new lower-privileged account and escalate its privileges. While manipulating this request, the Power User can also change the target account's password, effectively taking full control of it.