CVE-2021-3725Network attack vector

Command execution via unquoted directory history eval

Published Nov 30, 2021 · Updated Aug 3, 2024

OS command injection in Oh My Zsh before 06fc5fb allows attackers to execute commands after a user visits a crafted directory. The pop_past and pop_future functions pass unquoted directory-history values to eval, so shell metacharacters in a directory name become code. Exploitation requires the dirhistory plugin, entry into an attacker-crafted directory, and Alt-Left or Alt-Right navigation; commands run with the user's shell privileges.

CVSS severity7.5
High
EPSS probability1.05%
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 Oh My Zsh before 06fc5fb allows attackers to execute commands after a user visits a crafted directory. The pop_past and pop_future functions pass unquoted directory-history values to eval, so shell metacharacters in a directory name become code. Exploitation requires the dirhistory plugin, entry into an attacker-crafted directory, and Alt-Left or Alt-Right navigation; commands run with the user's shell privileges.

The record

CVE
CVE-2021-3725
Published
Nov 30, 2021
Updated
Aug 3, 2024
Vendor
Oh My Zsh
Product
Oh My Zsh
Classifications
CWE-78, CWE-94, T1204
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 30, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 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=unspecified <06fc5fb

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Oh My Zsh · Oh My Zshversion=unspecified <06fc5fb

Published CVSS scores

6.8NIST NVDAV:N/AC:M/Au:N/C:P/I:P/A:P
7.5huntr.devCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
8.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/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 exploitUnconfirmed

Weakness, pattern, technique

CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
CWE-94Improper Control of Generation of Code ('Code Injection')
T1204User Execution

Public exploit references

No public exploit references are available in this record.

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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