CVE-2022-3844Network attack vector

Cross-site scripting via unescaped terminal username

Published Nov 2, 2022 · Updated Aug 3, 2024

Cross-site scripting in Webmin 2.001 allows remote authenticated users to inject browser-executed code through xterm/index.cgi. When an invalid user value reaches the error path, index.cgi inserts it into the index_euser message without HTML escaping. Exploitation requires Webmin access and a victim to render the crafted response, enabling page-content modification in that victim's session.

CVSS severity6.1
Medium
EPSS probability0.65%
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

Cross-site scripting in Webmin 2.001 allows remote authenticated users to inject browser-executed code through xterm/index.cgi. When an invalid user value reaches the error path, index.cgi inserts it into the index_euser message without HTML escaping. Exploitation requires Webmin access and a victim to render the crafted response, enabling page-content modification in that victim's session.

The record

CVE
CVE-2022-3844
Published
Nov 2, 2022
Updated
Aug 3, 2024
Vendor
Webmin
Product
Webmin
Classifications
CWE-79, CWE-80
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Nov 2, 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?

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

  1. Affected versionversion=2.001

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Webmin · Webminversion=2.001

Published CVSS scores

6.1NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
4.0VulDB CNAAV:N/AC:L/Au:S/C:N/I:P/A:N
3.5VulDB CNACVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N
3.5VulDB CNACVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CWE-80Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS)

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

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