CVE-2025-61591

HIGHPre-NVD 8.88.8—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 8.8 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 1.1%, top 38% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, secondary
8.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 8.8Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

Cursor is a code editor built for programming with AI. In versions 1.7 and below, when MCP uses OAuth authentication with an untrusted MCP server, an attacker can impersonate a malicious MCP server and return crafted, maliciously injected commands during the interaction process, leading to command injection and potential remote code execution. If chained with an untrusted MCP service via OAuth, this command injection vulnerability could allow arbitrary code execution on the host by the agent. This can then be used to directly compromise the system by executing malicious commands with full user privileges. This issue does not currently have a fixed release version, but there is a patch, 2025.09.17-25b418f.

CVSS v3
8.8
EG Score
8.8(medium)
EG Risk
55(Track)
EG Risk 55/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity88% × 45%
Exploitation1% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
65%
KEV
Not listed

Published

October 3, 2025

Last Modified

June 17, 2026

Advisory Details (1)

Auto-updated Jul 26, 2026
Patch available. Sources: github.
github Patch Available

Remote Code Execution in Cursor CLI via Cursor Agent MCP OAuth2 Communication · Advisory · cursor/cursor · GitHub

https://github.com/cursor/cursor/security/advisories/GHSA-wj33-264c-j9cq

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 5× in last 7d / 24× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 147 total refreshes for this CVE.

  1. 2026-09-20 20:15 UTCEPSS rescore
  2. 2026-09-19 15:42 UTCEPSS rescore
  3. 2026-09-18 19:27 UTCEPSS rescore
  4. 2026-09-17 19:30 UTCEPSS rescore
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  1. 2026-08-21 23:48 UTCEPSS rescore
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  25. 2026-07-30 16:27 UTCEPSS rescore
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  27. 2026-07-28 15:35 UTCEPSS rescore
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  36. 2026-07-23 03:00 UTCEG score recompute
  37. 2026-07-22 14:08 UTCEPSS rescore
  38. 2026-07-21 15:24 UTCEPSS rescore
  39. 2026-07-20 17:08 UTCEPSS rescore
  40. 2026-07-19 14:30 UTCEPSS rescore
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  43. 2026-07-18 10:04 UTCEPSS rescore
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  45. 2026-07-16 17:02 UTCEPSS rescore
  46. 2026-07-15 16:57 UTCEPSS rescore
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  48. 2026-07-15 01:59 UTCEPSS rescore
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  50. 2026-07-13 22:29 UTCEPSS rescore
  51. 2026-07-13 06:12 UTCEPSS rescore
  52. 2026-07-12 05:46 UTCEPSS rescore
  53. 2026-07-11 08:27 UTCEPSS rescore
  54. 2026-07-09 19:09 UTCEPSS rescore
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  56. 2026-07-07 13:46 UTCEPSS rescore
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  65. 2026-07-01 15:06 UTCEPSS rescore
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  67. 2026-06-30 23:22 UTCEPSS rescore
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  72. 2026-06-28 04:56 UTCEPSS rescore
  73. 2026-06-28 04:55 UTCEPSS rescore
  74. 2026-06-27 03:08 UTCEPSS rescore
  75. 2026-06-25 13:49 UTCEPSS rescore

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Frequently asked(5)

What is CVE-2025-61591?
CVE-2025-61591 is a high vulnerability published on October 3, 2025. Cursor is a code editor built for programming with AI. In versions 1.7 and below, when MCP uses OAuth authentication with an untrusted MCP server, an attacker can impersonate a malicious MCP server and return crafted, maliciously injected commands during the interaction process, leading to command…
When was CVE-2025-61591 disclosed?
CVE-2025-61591 was first published in the National Vulnerability Database on October 3, 2025, with the most recent update on June 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2025-61591 actively exploited?
CVE-2025-61591 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 34.8% of all scored CVEs.
What is the CVSS score of CVE-2025-61591?
CVE-2025-61591 has a CVSS v3 base score of 8.8 (NVD).
How do I remediate CVE-2025-61591?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2025-61591, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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