CVE-2020-27227Public exploitNetwork attack vector

Unauthenticated command execution via shell.jsp parameter

Published Apr 13, 2021 · Updated Aug 4, 2024

Command injection in OpenClinic GA 5.173.3 allows remote attackers to execute operating-system commands via crafted web requests. The /openclinic/util/shell.jsp endpoint accepts the c parameter as a command and executes it after issuing a valid session cookie. Two requests are required, but no credentials or user interaction are needed; commands run with NT System privileges on the tested installation.

CVSS severity10.0
Critical
EPSS probability2.89%
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 OpenClinic GA 5.173.3 allows remote attackers to execute operating-system commands via crafted web requests. The /openclinic/util/shell.jsp endpoint accepts the c parameter as a command and executes it after issuing a valid session cookie. Two requests are required, but no credentials or user interaction are needed; commands run with NT System privileges on the tested installation.

The record

CVE
CVE-2020-27227
Published
Apr 13, 2021
Updated
Aug 4, 2024
Vendor
OpenClinic GA Project
Product
OpenClinic GA
Classifications
CWE-77, CWE-78, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 13, 2021CVE 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?

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

  1. Affected versionversion=OpenClinic GA 5.173.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

OpenClinic GA Project · OpenClinic GAversion=OpenClinic GA 5.173.3

Published CVSS scores

9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
10.0Cisco TalosCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
10.0NIST NVDAV:N/AC:L/Au:N/C:C/I:C/A:C

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')
T1190Exploit Public-Facing Application

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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