CVE-2025-6775Public exploitNetwork attack vector

Authenticated OS command execution via username shell interpolation

Published Jun 27, 2025 · Updated Jun 27, 2025

Command injection in xiaoyunjie openvpn-cms-flask 1.2.0 through 1.2.7 allows remote authenticated users to execute OS commands. The create_user function joins the username into a raw vpnuser command string, which Cmd.onetime_shell passes to subprocess.Popen with shell=True. Access to the group-restricted user creation API and valid privileged credentials is required; injected commands execute with the service's operating-system privileges.

CVSS severity9.8
Critical
EPSS probability3.20%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Command injection in xiaoyunjie openvpn-cms-flask 1.2.0 through 1.2.7 allows remote authenticated users to execute OS commands. The create_user function joins the username into a raw vpnuser command string, which Cmd.onetime_shell passes to subprocess.Popen with shell=True. Access to the group-restricted user creation API and valid privileged credentials is required; injected commands execute with the service's operating-system privileges.

The record

CVE
CVE-2025-6775
Published
Jun 27, 2025
Updated
Jun 27, 2025
Vendor
xiaoyunjie
Product
openvpn-cms-flask
Classifications
CWE-74, CWE-77, T1059.004
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Jun 27, 2025CVE publishedPublication date reported by the CVE source.
  2. Jun 27, 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=1.2.0
  2. Affected versionversion=1.2.1
  3. Affected versionversion=1.2.2
  4. Affected versionversion=1.2.3
  5. Affected versionversion=1.2.4
  6. Affected versionversion=1.2.5
  7. Affected versionversion=1.2.6
  8. Affected versionversion=1.2.7

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

xiaoyunjie · openvpn-cms-flaskversion=1.2.0; version=1.2.1; version=1.2.2; version=1.2.3; version=1.2.4; version=1.2.5; version=1.2.6; version=1.2.7

Published CVSS scores

2.1VulDBCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P
6.3VulDBCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
9.8NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
6.5VulDBAV:N/AC:L/Au:S/C:P/I:P/A:P

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
Privilegesadmin
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-74Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')
CWE-77Improper Neutralization of Special Elements used in a Command ('Command Injection')
T1059.004Command and Scripting Interpreter: Unix Shell

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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