CVE-2025-9262Public exploitNetwork attack vector

Remote command execution via unsanitized OAuth URL

Published Aug 20, 2025 · Updated Aug 21, 2025

OS command injection in wong2 mcp-cli 1.13.0 allows remote attackers to execute commands when a user connects to a malicious MCP server. redirectToAuthorization passes the server-supplied OAuth authorization URL directly to the open package without validation or sanitization. The demonstrated injection uses PowerShell subexpressions on Windows and requires a user to direct the client to an attacker-controlled Streamable HTTP server.

CVSS severity8.1
High
EPSS probability5.24%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

OS command injection in wong2 mcp-cli 1.13.0 allows remote attackers to execute commands when a user connects to a malicious MCP server. redirectToAuthorization passes the server-supplied OAuth authorization URL directly to the open package without validation or sanitization. The demonstrated injection uses PowerShell subexpressions on Windows and requires a user to direct the client to an attacker-controlled Streamable HTTP server.

The record

CVE
CVE-2025-9262
Published
Aug 20, 2025
Updated
Aug 21, 2025
Vendor
wong2
Product
mcp-cli
Classifications
CWE-77, CWE-78, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 20, 2025CVE publishedPublication date reported by the CVE source.
  2. Aug 21, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=1.13.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

wong2 · mcp-cliversion=1.13.0

Published CVSS scores

5.1VulDBAV:N/AC:H/Au:N/C:P/I:P/A:P
2.9VulDBCVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P
8.1NVDCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
5.6VulDBCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-77Improper Neutralization of Special Elements used in a Command ('Command Injection')
CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
T1203Exploitation for Client Execution

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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