CVE-2025-61591
CVE-2025-61591 is a high-severity vulnerability in Anysphere Cursor with a CVSS 3.x base score of 8.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-78.
Key facts
- Severity: High (CVSS 3.x base score 8.8)
- EPSS exploit prediction: 1% (63rd percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2025-33205
- Weakness: CWE-78
- Affected product: Anysphere Cursor
- Published:
- Last modified:
Description
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.
Frequently asked questions
- What is CVE-2025-61591?
- 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.
- How severe is CVE-2025-61591?
- CVE-2025-61591 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
- Is CVE-2025-61591 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (63rd percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2025-61591?
- CVE-2025-61591 affects Anysphere Cursor. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2025-61591?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
- Does CVE-2025-61591 have an EU (EUVD) identifier?
- Yes. CVE-2025-61591 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-33205.
- When was CVE-2025-61591 published?
- CVE-2025-61591 was published on 2025-10-03 and last updated on 2026-06-17.
References
Affected products (1)
- cpe:2.3:a:anysphere:cursor:*:*:*:*:*:*:*:*
More vulnerabilities in Anysphere Cursor
- CVE-2026-50549 — Critical (CVSS 9.8): Cursor is a code editor built for programming with AI. Prior to 3.0, Cursor runs agent terminal commands in a sandbox…
- CVE-2026-50548 — Critical (CVSS 9.8): Cursor is a code editor built for programming with AI. Prior to 3.0, Cursor runs agent terminal commands in a sandbox…
- CVE-2026-22708 — Critical (CVSS 9.8): Cursor is a code editor built for programming with AI. Prior to 2.3, hen the Cursor Agent is running in Auto-Run Mode…
- CVE-2025-54133 — Critical (CVSS 9.6): Cursor is a code editor built for programming with AI. In versions 1.17 through 1.2, there is a UI information…
- CVE-2026-63093 — High (CVSS 8.8): Cursor for Windows version 3.2.16 contains a binary planting vulnerability that allows remote attackers to achieve…
- CVE-2026-31854 — High (CVSS 8.8): Cursor is a code editor built for programming with AI. Prior to 2.0 ,if a visited website contains maliciously crafted…
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