CVE-2021-43857Public exploitNetwork attack vector

Unauthenticated code execution via project name injection

Published Dec 27, 2021 · Updated Aug 4, 2024

OS command injection in Gerapy before 0.9.8 allows remote attackers to execute arbitrary commands through a crafted project name. The project_configure view interpolates the request-derived project name into a command string and passes it to Popen with shell execution enabled. Network access to an exposed Gerapy web server is sufficient, and successful exploitation runs commands with the server process privileges.

CVSS severity9.3
Critical
EPSS probability55.33%
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 Gerapy before 0.9.8 allows remote attackers to execute arbitrary commands through a crafted project name. The project_configure view interpolates the request-derived project name into a command string and passes it to Popen with shell execution enabled. Network access to an exposed Gerapy web server is sufficient, and successful exploitation runs commands with the server process privileges.

The record

CVE
CVE-2021-43857
Published
Dec 27, 2021
Updated
Aug 4, 2024
Vendor
Gerapy
Product
Gerapy
Classifications
CWE-78, T1059, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 27, 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=< 0.9.8

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Gerapy · Gerapyversion=< 0.9.8

Published CVSS scores

8.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
9.3GitHubCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
6.5NIST NVDAV:N/AC:L/Au:S/C:P/I:P/A:P
9.8GitHub, Inc.CVSS: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 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-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
T1059Command and Scripting Interpreter
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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