CVE-2020-13167Public exploitNetwork attack vector

Unauthenticated code execution via password parameter injection

Published May 19, 2020 · Updated Aug 4, 2024

OS command injection in Netsweeper WebAdmin 6.4.3 and earlier allows remote attackers to execute arbitrary code without authentication. The unixlogin.php endpoint passes the client-controlled password to service.sh, whose authcheck action embeds it inside a Python -c string without neutralizing quotes or other metacharacters. A crafted Referer matching an allowlisted path and nonempty parameters reach the endpoint, and the injected Python runs operating-system commands as root.

CVSS severity9.8
Critical
EPSS probability95.42%
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 Netsweeper WebAdmin 6.4.3 and earlier allows remote attackers to execute arbitrary code without authentication. The unixlogin.php endpoint passes the client-controlled password to service.sh, whose authcheck action embeds it inside a Python -c string without neutralizing quotes or other metacharacters. A crafted Referer matching an allowlisted path and nonempty parameters reach the endpoint, and the injected Python runs operating-system commands as root.

The record

CVE
CVE-2020-13167
Published
May 19, 2020
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-78, T1059.006
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 19, 2020CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.5NIST NVDAV:N/AC:L/Au:N/C:P/I:P/A:P
9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
T1059.006Command and Scripting Interpreter: Python

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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