CVE-2025-0501

High

Published: 15 January 2025

Published

15 January 2025

Modified

15 April 2026

KEV Added

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Patch

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CVSS Score 7.5 CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

EPSS Score 0.0021 42.4th percentile

Risk Priority 15 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2025-0501 is a high-severity Improper Certificate Validation (CWE-295) vulnerability in Amazon WorkSpaces (inferred from references). Its CVSS base score is 7.5 (High).

Operationally, exploitation aligns with the MITRE ATT&CK technique Adversary-in-the-Middle (T1557); ranked at the 42.4th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

The strongest mitigations our analysis identified are NIST 800-53 SC-17 (Public Key Infrastructure Certificates) and SC-23 (Session Authenticity).

Threat & Defense at a Glance

What attackers do: exploitation maps to Adversary-in-the-Middle (T1557). What defenders deploy: see the NIST 800-53 controls recommended below.

Threat & Defense Details

Mitigating Controls (NIST 800-53 r5)AI

SC-17 Public Key Infrastructure Certificates good match

prevent

Requires proper management and validation of PKI certificates in WorkSpaces native clients, directly addressing the improper certificate validation (CWE-295) that enables MitM attacks.

SI-2 Flaw Remediation good match

prevent

Mandates timely flaw remediation through patching of vulnerable Amazon WorkSpaces clients as recommended by AWS, eliminating the PCoIP protocol vulnerability.

SC-23 Session Authenticity good match

prevent

Ensures authenticity of PCoIP remote sessions, preventing attacker access via man-in-the-middle interception in WorkSpaces connections.

MITRE ATT&CK Enterprise TechniquesAI

T1557 Adversary-in-the-Middle Credential Access

Adversaries may attempt to position themselves between two or more networked devices using an adversary-in-the-middle (AiTM) technique to support follow-on behaviors such as [Network Sniffing](https://attack.

attack.mitre.org →

Why these techniques?

Improper certificate validation directly enables man-in-the-middle positioning for session access, mapping to Adversary-in-the-Middle.

Confidence: HIGH · MITRE ATT&CK Enterprise v18.1

NVD Description

An issue in the native clients for Amazon WorkSpaces (when running PCoIP protocol) may allow an attacker to access remote sessions via man-in-the-middle.

Deeper analysisAI

CVE-2025-0501 is a vulnerability in the native clients for Amazon WorkSpaces when using the PCoIP protocol. It stems from improper certificate validation (CWE-295), which may enable an attacker to access remote sessions through a man-in-the-middle attack. The issue affects the Android, Linux, macOS, and Windows native clients for Amazon WorkSpaces, with a CVSS v3.1 base score of 7.5 (AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H), indicating high impact but requiring high attack complexity and user interaction.

An attacker with network access can exploit this vulnerability by positioning themselves for a man-in-the-middle interception, potentially without privileges, though it demands user interaction such as connecting through a malicious network or clicking a prompt. Successful exploitation grants high-impact access to remote WorkSpaces sessions, compromising confidentiality, integrity, and availability of the targeted sessions.

AWS has published a security bulletin at https://aws.amazon.com/security/security-bulletins/AWS-2025-001/ detailing the issue. Mitigation involves updating the affected native clients, with release notes available for Android (https://docs.aws.amazon.com/workspaces/latest/userguide/amazon-workspaces-android-client.html#android-release-notes), Linux (https://docs.aws.amazon.com/workspaces/latest/userguide/amazon-workspaces-linux-client.html#linux-release-notes), macOS (https://docs.aws.amazon.com/workspaces/latest/userguide/amazon-workspaces-osx-client.html#osx-release-notes), and Windows (https://docs.aws.amazon.com/workspaces/latest/userguide/amazon-workspaces-windows-client.html#windows-release-notes).