What is CVE-2025-6514?
mcp-remote is exposed to OS command injection when connecting to untrusted MCP servers due to crafted input from the authorization_endpoint response URL
The record classifies CVE-2025-6514 under weakness class CWE-78. Its CVSS v3 base vector states that the flaw is reachable remotely over the network, needs no prior authentication, needs a user to take an action first, and has high impact on confidentiality, integrity, availability. The identifier was first published 491 days ago.
Severity and exploitation probability
- CVSS v3.1 base score
- 9.6 — CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H - EPSS (FIRST)
- 77.0% probability of exploitation in the next 30 days, higher than 99.5% of all scored CVEs
- CISA KEV
- Not listed in the CISA Known Exploited Vulnerabilities catalog
- Threadlinqs priority
- 10/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
- Published
- 2025-07-09
Is CVE-2025-6514 being exploited?
Weaponised exploit code for CVE-2025-6514 is publicly available. 2 public proof-of-concept repositories are tracked for this identifier. It currently carries a trending score of 38 in the Threadlinqs vulnerability feed.
- Cyberency/CVE-2025-6514 (github)
- trickest/cve (trickest)
Affected products and versions
Affected software packages:
npm:mcp-remote— patched in 0.1.16
How to fix CVE-2025-6514
Fixed versions are recorded for 1 package: npm:mcp-remote 0.1.16. Patch reference: https://github.com/geelen/mcp-remote/commit/607b226a356cb61a239ffaba2fb3db1c9dea4bac. Apply the vendor fix referenced above to every affected product listed in this record, then confirm the running version against the vendor advisory.
Threat activity tracking CVE-2025-6514
1 tracked threat in the Threadlinqs corpus references CVE-2025-6514, either in the campaign’s CVE list or as an indicator on the campaign record.
Sources
Enriched from CVE.org, NVD, FIRST EPSS, GitHub Security Advisories, public proof-of-concept repositories. This product uses the NVD API but is not endorsed or certified by the NVD.