CVE-2021-47747Public exploitNetwork attack vector

Authenticated command execution via unchecked POST parameters

Published Dec 31, 2025 · Updated Dec 31, 2025

OS command injection in meterN 1.2.3 allows remote authenticated users to execute arbitrary commands through its web interface. The admin_meter2.php and admin_indicator2.php handlers pass COMMANDx and LIVECOMMANDx POST values to PHP exec() without an allowlist. Direct exploitation requires access to authenticated administration endpoints; injected commands run with the web-server account's operating-system permissions.

CVSS severity8.6
High
EPSS probability0.69%
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 meterN 1.2.3 allows remote authenticated users to execute arbitrary commands through its web interface. The admin_meter2.php and admin_indicator2.php handlers pass COMMANDx and LIVECOMMANDx POST values to PHP exec() without an allowlist. Direct exploitation requires access to authenticated administration endpoints; injected commands run with the web-server account's operating-system permissions.

The record

CVE
CVE-2021-47747
Published
Dec 31, 2025
Updated
Dec 31, 2025
Vendor
Jean-Marc Louviaux
Product
meterN
Classifications
CWE-78, T1190, T1059
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Dec 31, 2025CVE publishedPublication date reported by the CVE source.
  2. Dec 31, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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

  1. Affected versionversion=1.2.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Jean-Marc Louviaux · meterNversion=1.2.3

Published CVSS scores

8.8VulnCheckCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
8.6VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
T1190Exploit Public-Facing Application
T1059Command and Scripting Interpreter

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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