CVE-2025-66414 Vulnerability Analysis & Exploit Details

CVE-2025-66414
Vulnerability Scoring

8.1
/10
Severe Risk

Cybersecurity professionals consider CVE-2025-66414 an immediate threat requiring urgent mitigation.

Attack Complexity Details

  • Attack Complexity: Low
    Exploits can be performed without significant complexity or special conditions.
  • Attack Vector: Network
    Vulnerability is exploitable over a network without physical access.
  • Privileges Required: None
    No privileges are required for exploitation.
  • Scope: Unchanged
    Exploit remains within the originally vulnerable component.
  • User Interaction: Required
    User interaction is necessary for successful exploitation.

CVE-2025-66414 Details

Status: Analyzed

Last updated: 🕢 10 Mar 2026, 19:40 UTC
Originally published on: 🕖 02 Dec 2025, 19:15 UTC

Time between publication and last update: 98 days

CVSS Release: version 3

CVSS3 Source

nvd@nist.gov

CVSS3 Type

Primary

CVSS3 Vector

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

CVE-2025-66414 Vulnerability Summary

CVE-2025-66414: MCP TypeScript SDK is the official TypeScript SDK for Model Context Protocol servers and clients. Prior to 1.24.0, The Model Context Protocol (MCP) TypeScript SDK does not enable DNS rebinding protection by default for HTTP-based servers. When an HTTP-based MCP server is run on localhost without authentication with StreamableHTTPServerTransport or SSEServerTransport and has not enabled enableDnsRebindingProtection, a malicious website could exploit DNS rebinding to bypass same-origin policy restrictions and send requests to the local MCP server. This could allow an attacker to invoke tools or access resources exposed by the MCP server on behalf of the user in those limited circumstances. Note that running HTTP-based MCP servers locally without authentication is not recommended per MCP security best practices. This issue does not affect servers using stdio transport. This vulnerability is fixed in 1.24.0.

Assessing the Risk of CVE-2025-66414

Access Complexity Graph

The exploitability of CVE-2025-66414 depends on two key factors: attack complexity (the level of effort required to execute an exploit) and privileges required (the access level an attacker needs).

Exploitability Analysis for CVE-2025-66414

With low attack complexity and no required privileges, CVE-2025-66414 is an easy target for cybercriminals. Organizations should prioritize immediate mitigation measures to prevent unauthorized access and data breaches.

Understanding AC and PR

A lower complexity and fewer privilege requirements make exploitation easier. Security teams should evaluate these aspects to determine the urgency of mitigation strategies, such as patch management and access control policies.

Attack Complexity (AC) measures the difficulty in executing an exploit. A high AC means that specific conditions must be met, making an attack more challenging, while a low AC means the vulnerability can be exploited with minimal effort.

Privileges Required (PR) determine the level of system access necessary for an attack. Vulnerabilities requiring no privileges are more accessible to attackers, whereas high privilege requirements limit exploitation to authorized users with elevated access.

CVSS Score Breakdown Chart

Above is the CVSS Sub-score Breakdown for CVE-2025-66414, illustrating how Base, Impact, and Exploitability factors combine to form the overall severity rating. A higher sub-score typically indicates a more severe or easier-to-exploit vulnerability.

CIA Impact Analysis

Below is the Impact Analysis for CVE-2025-66414, showing how Confidentiality, Integrity, and Availability might be affected if the vulnerability is exploited. Higher values usually signal greater potential damage.

  • Confidentiality: High
    Exploiting CVE-2025-66414 can result in unauthorized access to sensitive data, severely compromising data privacy.
  • Integrity: High
    CVE-2025-66414 could allow unauthorized modifications to data, potentially affecting system reliability and trust.
  • Availability: None
    CVE-2025-66414 does not impact system availability.

CVE-2025-66414 References

External References

CWE Common Weakness Enumeration

CWE-1188

CAPEC Common Attack Pattern Enumeration and Classification

  • Exploitation of Thunderbolt Protection Flaws CAPEC-665 An adversary leverages a firmware weakness within the Thunderbolt protocol, on a computing device to manipulate Thunderbolt controller firmware in order to exploit vulnerabilities in the implementation of authorization and verification schemes within Thunderbolt protection mechanisms. Upon gaining physical access to a target device, the adversary conducts high-level firmware manipulation of the victim Thunderbolt controller SPI (Serial Peripheral Interface) flash, through the use of a SPI Programing device and an external Thunderbolt device, typically as the target device is booting up. If successful, this allows the adversary to modify memory, subvert authentication mechanisms, spoof identities and content, and extract data and memory from the target device. Currently 7 major vulnerabilities exist within Thunderbolt protocol with 9 attack vectors as noted in the Execution Flow.

Vulnerable Configurations

  • cpe:2.3:a:lfprojects:mcp_typescript_sdk:0.1.0:*:*:*:*:*:*:*
    cpe:2.3:a:lfprojects:mcp_typescript_sdk:0.1.0:*:*:*:*:*:*:*
  • cpe:2.3:a:lfprojects:mcp_typescript_sdk:0.2.0:*:*:*:*:*:*:*
    cpe:2.3:a:lfprojects:mcp_typescript_sdk:0.2.0:*:*:*:*:*:*:*
  • cpe:2.3:a:lfprojects:mcp_typescript_sdk:0.3.0:*:*:*:*:*:*:*
    cpe:2.3:a:lfprojects:mcp_typescript_sdk:0.3.0:*:*:*:*:*:*:*
  • cpe:2.3:a:lfprojects:mcp_typescript_sdk:0.3.1:*:*:*:*:*:*:*
    cpe:2.3:a:lfprojects:mcp_typescript_sdk:0.3.1:*:*:*:*:*:*:*
  • cpe:2.3:a:lfprojects:mcp_typescript_sdk:0.3.2:*:*:*:*:*:*:*
    cpe:2.3:a:lfprojects:mcp_typescript_sdk:0.3.2:*:*:*:*:*:*:*
  • cpe:2.3:a:lfprojects:mcp_typescript_sdk:0.4.0:*:*:*:*:*:*:*
    cpe:2.3:a:lfprojects:mcp_typescript_sdk:0.4.0:*:*:*:*:*:*:*
  • cpe:2.3:a:lfprojects:mcp_typescript_sdk:0.5.0:*:*:*:*:*:*:*
    cpe:2.3:a:lfprojects:mcp_typescript_sdk:0.5.0:*:*:*:*:*:*:*
  • cpe:2.3:a:lfprojects:mcp_typescript_sdk:0.6.0:*:*:*:*:*:*:*
    cpe:2.3:a:lfprojects:mcp_typescript_sdk:0.6.0:*:*:*:*:*:*:*
  • cpe:2.3:a:lfprojects:mcp_typescript_sdk:0.6.1:*:*:*:*:*:*:*
    cpe:2.3:a:lfprojects:mcp_typescript_sdk:0.6.1:*:*:*:*:*:*:*
  • cpe:2.3:a:lfprojects:mcp_typescript_sdk:0.7.0:*:*:*:*:*:*:*
    cpe:2.3:a:lfprojects:mcp_typescript_sdk:0.7.0:*:*:*:*:*:*:*
  • cpe:2.3:a:lfprojects:mcp_typescript_sdk:0.15.1:*:*:*:*:*:*:*
    cpe:2.3:a:lfprojects:mcp_typescript_sdk:0.15.1:*:*:*:*:*:*:*
  • cpe:2.3:a:lfprojects:mcp_typescript_sdk:1.0.0:*:*:*:*:*:*:*
    cpe:2.3:a:lfprojects:mcp_typescript_sdk:1.0.0:*:*:*:*:*:*:*
  • cpe:2.3:a:lfprojects:mcp_typescript_sdk:1.0.1:*:*:*:*:*:*:*
    cpe:2.3:a:lfprojects:mcp_typescript_sdk:1.0.1:*:*:*:*:*:*:*
  • cpe:2.3:a:lfprojects:mcp_typescript_sdk:1.0.2:*:*:*:*:*:*:*
    cpe:2.3:a:lfprojects:mcp_typescript_sdk:1.0.2:*:*:*:*:*:*:*
  • cpe:2.3:a:lfprojects:mcp_typescript_sdk:1.0.3:*:*:*:*:*:*:*
    cpe:2.3:a:lfprojects:mcp_typescript_sdk:1.0.3:*:*:*:*:*:*:*
  • cpe:2.3:a:lfprojects:mcp_typescript_sdk:1.0.4:*:*:*:*:*:*:*
    cpe:2.3:a:lfprojects:mcp_typescript_sdk:1.0.4:*:*:*:*:*:*:*
  • cpe:2.3:a:lfprojects:mcp_typescript_sdk:1.1.0:*:*:*:*:*:*:*
    cpe:2.3:a:lfprojects:mcp_typescript_sdk:1.1.0:*:*:*:*:*:*:*
  • cpe:2.3:a:lfprojects:mcp_typescript_sdk:1.1.1:*:*:*:*:*:*:*
    cpe:2.3:a:lfprojects:mcp_typescript_sdk:1.1.1:*:*:*:*:*:*:*
  • cpe:2.3:a:lfprojects:mcp_typescript_sdk:1.2.0:*:*:*:*:*:*:*
    cpe:2.3:a:lfprojects:mcp_typescript_sdk:1.2.0:*:*:*:*:*:*:*
  • cpe:2.3:a:lfprojects:mcp_typescript_sdk:1.3.0:*:*:*:*:*:*:*
    cpe:2.3:a:lfprojects:mcp_typescript_sdk:1.3.0:*:*:*:*:*:*:*
  • cpe:2.3:a:lfprojects:mcp_typescript_sdk:1.3.1:*:*:*:*:*:*:*
    cpe:2.3:a:lfprojects:mcp_typescript_sdk:1.3.1:*:*:*:*:*:*:*
  • cpe:2.3:a:lfprojects:mcp_typescript_sdk:1.3.2:*:*:*:*:*:*:*
    cpe:2.3:a:lfprojects:mcp_typescript_sdk:1.3.2:*:*:*:*:*:*:*
  • cpe:2.3:a:lfprojects:mcp_typescript_sdk:1.4.0:*:*:*:*:*:*:*
    cpe:2.3:a:lfprojects:mcp_typescript_sdk:1.4.0:*:*:*:*:*:*:*
  • cpe:2.3:a:lfprojects:mcp_typescript_sdk:1.4.1:*:*:*:*:*:*:*
    cpe:2.3:a:lfprojects:mcp_typescript_sdk:1.4.1:*:*:*:*:*:*:*
  • cpe:2.3:a:lfprojects:mcp_typescript_sdk:1.5.0:*:*:*:*:*:*:*
    cpe:2.3:a:lfprojects:mcp_typescript_sdk:1.5.0:*:*:*:*:*:*:*
  • cpe:2.3:a:lfprojects:mcp_typescript_sdk:1.6.0:*:*:*:*:*:*:*
    cpe:2.3:a:lfprojects:mcp_typescript_sdk:1.6.0:*:*:*:*:*:*:*
  • cpe:2.3:a:lfprojects:mcp_typescript_sdk:1.6.1:*:*:*:*:*:*:*
    cpe:2.3:a:lfprojects:mcp_typescript_sdk:1.6.1:*:*:*:*:*:*:*
  • cpe:2.3:a:lfprojects:mcp_typescript_sdk:1.7.0:*:*:*:*:*:*:*
    cpe:2.3:a:lfprojects:mcp_typescript_sdk:1.7.0:*:*:*:*:*:*:*
  • cpe:2.3:a:lfprojects:mcp_typescript_sdk:1.8.0:*:*:*:*:*:*:*
    cpe:2.3:a:lfprojects:mcp_typescript_sdk:1.8.0:*:*:*:*:*:*:*
  • cpe:2.3:a:lfprojects:mcp_typescript_sdk:1.9.0:*:*:*:*:*:*:*
    cpe:2.3:a:lfprojects:mcp_typescript_sdk:1.9.0:*:*:*:*:*:*:*
  • cpe:2.3:a:lfprojects:mcp_typescript_sdk:1.10.0:*:*:*:*:*:*:*
    cpe:2.3:a:lfprojects:mcp_typescript_sdk:1.10.0:*:*:*:*:*:*:*
  • cpe:2.3:a:lfprojects:mcp_typescript_sdk:1.10.1:*:*:*:*:*:*:*
    cpe:2.3:a:lfprojects:mcp_typescript_sdk:1.10.1:*:*:*:*:*:*:*
  • cpe:2.3:a:lfprojects:mcp_typescript_sdk:1.10.2:*:*:*:*:*:*:*
    cpe:2.3:a:lfprojects:mcp_typescript_sdk:1.10.2:*:*:*:*:*:*:*
  • cpe:2.3:a:lfprojects:mcp_typescript_sdk:1.11.0:*:*:*:*:*:*:*
    cpe:2.3:a:lfprojects:mcp_typescript_sdk:1.11.0:*:*:*:*:*:*:*
  • cpe:2.3:a:lfprojects:mcp_typescript_sdk:1.11.1:*:*:*:*:*:*:*
    cpe:2.3:a:lfprojects:mcp_typescript_sdk:1.11.1:*:*:*:*:*:*:*
  • cpe:2.3:a:lfprojects:mcp_typescript_sdk:1.11.2:*:*:*:*:*:*:*
    cpe:2.3:a:lfprojects:mcp_typescript_sdk:1.11.2:*:*:*:*:*:*:*
  • cpe:2.3:a:lfprojects:mcp_typescript_sdk:1.11.3:*:*:*:*:*:*:*
    cpe:2.3:a:lfprojects:mcp_typescript_sdk:1.11.3:*:*:*:*:*:*:*
  • cpe:2.3:a:lfprojects:mcp_typescript_sdk:1.11.4:*:*:*:*:*:*:*
    cpe:2.3:a:lfprojects:mcp_typescript_sdk:1.11.4:*:*:*:*:*:*:*
  • cpe:2.3:a:lfprojects:mcp_typescript_sdk:1.11.5:*:*:*:*:*:*:*
    cpe:2.3:a:lfprojects:mcp_typescript_sdk:1.11.5:*:*:*:*:*:*:*
  • cpe:2.3:a:lfprojects:mcp_typescript_sdk:1.12.0:*:*:*:*:*:*:*
    cpe:2.3:a:lfprojects:mcp_typescript_sdk:1.12.0:*:*:*:*:*:*:*
  • cpe:2.3:a:lfprojects:mcp_typescript_sdk:1.12.1:*:*:*:*:*:*:*
    cpe:2.3:a:lfprojects:mcp_typescript_sdk:1.12.1:*:*:*:*:*:*:*
  • cpe:2.3:a:lfprojects:mcp_typescript_sdk:1.12.2:*:*:*:*:*:*:*
    cpe:2.3:a:lfprojects:mcp_typescript_sdk:1.12.2:*:*:*:*:*:*:*
  • cpe:2.3:a:lfprojects:mcp_typescript_sdk:1.12.3:*:*:*:*:*:*:*
    cpe:2.3:a:lfprojects:mcp_typescript_sdk:1.12.3:*:*:*:*:*:*:*
  • cpe:2.3:a:lfprojects:mcp_typescript_sdk:1.13.0:*:*:*:*:*:*:*
    cpe:2.3:a:lfprojects:mcp_typescript_sdk:1.13.0:*:*:*:*:*:*:*
  • cpe:2.3:a:lfprojects:mcp_typescript_sdk:1.13.1:*:*:*:*:*:*:*
    cpe:2.3:a:lfprojects:mcp_typescript_sdk:1.13.1:*:*:*:*:*:*:*
  • cpe:2.3:a:lfprojects:mcp_typescript_sdk:1.13.2:*:*:*:*:*:*:*
    cpe:2.3:a:lfprojects:mcp_typescript_sdk:1.13.2:*:*:*:*:*:*:*
  • cpe:2.3:a:lfprojects:mcp_typescript_sdk:1.13.3:*:*:*:*:*:*:*
    cpe:2.3:a:lfprojects:mcp_typescript_sdk:1.13.3:*:*:*:*:*:*:*
  • cpe:2.3:a:lfprojects:mcp_typescript_sdk:1.14.0:*:*:*:*:*:*:*
    cpe:2.3:a:lfprojects:mcp_typescript_sdk:1.14.0:*:*:*:*:*:*:*
  • cpe:2.3:a:lfprojects:mcp_typescript_sdk:1.15.0:*:*:*:*:*:*:*
    cpe:2.3:a:lfprojects:mcp_typescript_sdk:1.15.0:*:*:*:*:*:*:*
  • cpe:2.3:a:lfprojects:mcp_typescript_sdk:1.15.1:*:*:*:*:*:*:*
    cpe:2.3:a:lfprojects:mcp_typescript_sdk:1.15.1:*:*:*:*:*:*:*
  • cpe:2.3:a:lfprojects:mcp_typescript_sdk:1.16.0:*:*:*:*:*:*:*
    cpe:2.3:a:lfprojects:mcp_typescript_sdk:1.16.0:*:*:*:*:*:*:*
  • cpe:2.3:a:lfprojects:mcp_typescript_sdk:1.17.0:*:*:*:*:*:*:*
    cpe:2.3:a:lfprojects:mcp_typescript_sdk:1.17.0:*:*:*:*:*:*:*
  • cpe:2.3:a:lfprojects:mcp_typescript_sdk:1.17.1:*:*:*:*:*:*:*
    cpe:2.3:a:lfprojects:mcp_typescript_sdk:1.17.1:*:*:*:*:*:*:*
  • cpe:2.3:a:lfprojects:mcp_typescript_sdk:1.17.2:*:*:*:*:*:*:*
    cpe:2.3:a:lfprojects:mcp_typescript_sdk:1.17.2:*:*:*:*:*:*:*
  • cpe:2.3:a:lfprojects:mcp_typescript_sdk:1.17.3:*:*:*:*:*:*:*
    cpe:2.3:a:lfprojects:mcp_typescript_sdk:1.17.3:*:*:*:*:*:*:*
  • cpe:2.3:a:lfprojects:mcp_typescript_sdk:1.17.4:*:*:*:*:*:*:*
    cpe:2.3:a:lfprojects:mcp_typescript_sdk:1.17.4:*:*:*:*:*:*:*
  • cpe:2.3:a:lfprojects:mcp_typescript_sdk:1.17.5:*:*:*:*:*:*:*
    cpe:2.3:a:lfprojects:mcp_typescript_sdk:1.17.5:*:*:*:*:*:*:*
  • cpe:2.3:a:lfprojects:mcp_typescript_sdk:1.18.0:*:*:*:*:*:*:*
    cpe:2.3:a:lfprojects:mcp_typescript_sdk:1.18.0:*:*:*:*:*:*:*
  • cpe:2.3:a:lfprojects:mcp_typescript_sdk:1.18.1:*:*:*:*:*:*:*
    cpe:2.3:a:lfprojects:mcp_typescript_sdk:1.18.1:*:*:*:*:*:*:*
  • cpe:2.3:a:lfprojects:mcp_typescript_sdk:1.18.2:*:*:*:*:*:*:*
    cpe:2.3:a:lfprojects:mcp_typescript_sdk:1.18.2:*:*:*:*:*:*:*
  • cpe:2.3:a:lfprojects:mcp_typescript_sdk:1.19.0:*:*:*:*:*:*:*
    cpe:2.3:a:lfprojects:mcp_typescript_sdk:1.19.0:*:*:*:*:*:*:*
  • cpe:2.3:a:lfprojects:mcp_typescript_sdk:1.20.0:*:*:*:*:*:*:*
    cpe:2.3:a:lfprojects:mcp_typescript_sdk:1.20.0:*:*:*:*:*:*:*
  • cpe:2.3:a:lfprojects:mcp_typescript_sdk:1.20.1:*:*:*:*:*:*:*
    cpe:2.3:a:lfprojects:mcp_typescript_sdk:1.20.1:*:*:*:*:*:*:*
  • cpe:2.3:a:lfprojects:mcp_typescript_sdk:1.20.2:*:*:*:*:*:*:*
    cpe:2.3:a:lfprojects:mcp_typescript_sdk:1.20.2:*:*:*:*:*:*:*
  • cpe:2.3:a:lfprojects:mcp_typescript_sdk:1.21.0:*:*:*:*:*:*:*
    cpe:2.3:a:lfprojects:mcp_typescript_sdk:1.21.0:*:*:*:*:*:*:*
  • cpe:2.3:a:lfprojects:mcp_typescript_sdk:1.21.1:*:*:*:*:*:*:*
    cpe:2.3:a:lfprojects:mcp_typescript_sdk:1.21.1:*:*:*:*:*:*:*
  • cpe:2.3:a:lfprojects:mcp_typescript_sdk:1.21.2:*:*:*:*:*:*:*
    cpe:2.3:a:lfprojects:mcp_typescript_sdk:1.21.2:*:*:*:*:*:*:*
  • cpe:2.3:a:lfprojects:mcp_typescript_sdk:1.22.0:*:*:*:*:*:*:*
    cpe:2.3:a:lfprojects:mcp_typescript_sdk:1.22.0:*:*:*:*:*:*:*
  • cpe:2.3:a:lfprojects:mcp_typescript_sdk:1.23.0:-:*:*:*:*:*:*
    cpe:2.3:a:lfprojects:mcp_typescript_sdk:1.23.0:-:*:*:*:*:*:*
  • cpe:2.3:a:lfprojects:mcp_typescript_sdk:1.23.0:beta0:*:*:*:*:*:*
    cpe:2.3:a:lfprojects:mcp_typescript_sdk:1.23.0:beta0:*:*:*:*:*:*
  • cpe:2.3:a:lfprojects:mcp_typescript_sdk:1.23.1:*:*:*:*:*:*:*
    cpe:2.3:a:lfprojects:mcp_typescript_sdk:1.23.1:*:*:*:*:*:*:*

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