CVE-2025-6514 | OS command injection in mcp-remote when connecting to untrusted MCP servers

mcp-remote is exposed to OS command injection when connecting to untrusted MCP servers due to crafted input from the authorization_endpoint response URL

Published: 2025-07-09 Last update: 2026-04-15 Assigner: [email protected] Source: [email protected]
NVD Status：Deferred，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2025-6514 is rated High Risk (77.9/100): CVSS Critical severity, with high exploitation likelihood (EPSS 47.21%, 99th percentile). EPSS ranks this CVE among the most likely to be exploited in the near term. EPSS rose +35.03% over the last day, indicating growing attacker interest. High exploitation likelihood—assess exposure and prioritize remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2025-6514

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 12.17% 47.21% +35.03%
2 2026-05-24 16.06% 12.17% -3.89%
3 2026-05-22 — 16.06% —

Full EPSS history (26 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2025-6514

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
9.6 3.1 CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:R)
A real person has to do something—click, install, enable—otherwise it doesn’t land.
Scope (S:C)
Breaking this can reach past the original component and bite other resources—bigger blast radius.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 2.8 6.0 [email protected]

Weakness enumeration for CVE-2025-6514

GitHub Security Advisory for CVE-2025-6514

GHSA-6xpm-ggf7-wc3p · Severity: critical · Ecosystem: npm — mcp-remote exposed to OS command injection via untrusted MCP server connections

Affected software / configurations for CVE-2025-6514

Vendor Product Version Raw CPE
No affected products in dataset.

References for CVE-2025-6514

cvelogic Threat Intelligence