UserminApplication · Webmin

CVE-2023-41159

MEDIUM · 5.4 CVSS v3.1 Published 2023-09-14
Mitigation only
No fix yet — a mitigation exists. There is no fixed release. A documented workaround reduces exposure in the meantime.
See remediation →
58/100
Remediation priority · Elevated
Remotely reachable

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
A Stored Cross-Site Scripting (XSS) vulnerability while editing the autoreply file page in Usermin 2.000 allows remote attackers to inject arbitrary web script or HTML by editing the forward file manually.

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis · moderate confidence

A stored Cross-Site Scripting (XSS) vulnerability exists in Usermin 2.000 where remote attackers can inject arbitrary web script or HTML by manually editing the forward file when configuring the autoreply file page. The malicious payload is stored and executed when other users access the affected page.

MitigationImplement proper input validation and context-aware output encoding for all user-supplied content in the autoreply/forward file editing functionality to neutralize malicious scripts.

Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.

Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.

NVD · CPE data
UserminApplication
Affected:= 2.000

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
Required
Scope
Changed
Confidentiality
Low
Integrity
Low
Availability
None

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.

dbcve checks

Work through these to decide whether this CVE applies to you.

  1. Confirm Usermin installation and version
    Run 'usermin --version' or check the package manager (dpkg -l usermin, rpm -qi usermin) to identify the installed Usermin version
    Affected if The installed version is exactly 2.000
  2. Verify mail forward/autoreply module is enabled
    Check /etc/usermin/config or the Usermin configuration for the 'forward' or 'autoreply' module status. Look for 'forward' or 'mail' in the module configuration directories under /etc/usermin/
    Affected if The forward or autoreply module is enabled in Usermin configuration
  3. Inspect forward file configuration for injected scripts
    Locate and examine forward files in user home directories (typically ~/.forward or /var/usermin/forward/) and any autoreply configuration files. Search for script tags (<script>), javascript: URIs, or other XSS payloads using grep -r '<script' /var/usermin/forward/
    Affected if Forward or autoreply configuration files contain suspicious HTML tags or script content that was not intentionally configured by the administrator
  4. Review Usermin access logs for the autoreply page
    Check Usermin logs (typically in /var/usermin/logs/ or /var/log/usermin) for access to the forward/autoreply editing interface. Look for unusual patterns or encoded payloads in the request logs
    Affected if Logs show requests to the forward/autoreply editing functionality with XSS payloads in the parameters

A user is affected if they have Usermin version 2.000 installed with the forward/autoreply module enabled AND malicious script content is found in forward configuration files or logs.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

From vendor data
Mitigation available No clean upgrade yet — mitigate in the meantime
Mitigation

Implement proper input validation and context-aware output encoding for all user-supplied content in the autoreply/forward file editing functionality to neutralize malicious scripts.

Fix this in Usermin Scoped from the published advisory
  • Consultation3.0 h
  • Implementation6.0 h
  • Testing4.0 h
  • Review / QA2.0 h
15.0 hours of engineering $2,640
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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2023-41159 in production — separate from our analysis above.

No notes yet

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What this is

A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.

What belongs here
  • Verified mitigations, workarounds, and config changes
  • Version or environment caveats, and links to real fixes
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