CVE-2021-32159Public exploitNetwork attack vector

Command execution via forged file-download request

Published Apr 11, 2022 · Updated Aug 3, 2024

CSRF in Webmin 1.973 Upload and Download allows remote attackers to execute commands when an administrator visits a malicious page. The updown/download.cgi handler accepts a cross-origin POST containing an attacker-hosted PHP file URL and a server-side web-root destination without a valid anti-CSRF check. Exploitation requires an authenticated Webmin administrator to load the attacker-controlled page, after which the downloaded web shell executes commands under the web server account.

CVSS severity8.8
High
EPSS probability2.31%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

CSRF in Webmin 1.973 Upload and Download allows remote attackers to execute commands when an administrator visits a malicious page. The updown/download.cgi handler accepts a cross-origin POST containing an attacker-hosted PHP file URL and a server-side web-root destination without a valid anti-CSRF check. Exploitation requires an authenticated Webmin administrator to load the attacker-controlled page, after which the downloaded web shell executes commands under the web server account.

The record

CVE
CVE-2021-32159
Published
Apr 11, 2022
Updated
Aug 3, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-352, T1204
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 11, 2022CVE 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

Compare your product and version with the public record. A matching version still requires validation against your environment.

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

6.8NIST NVDAV:N/AC:M/Au:N/C:P/I:P/A:P
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 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-352Cross-Site Request Forgery (CSRF)
T1204User Execution

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo