dbcve.org
Serv UApplication · Solarwinds

CVE-2023-23841

HIGH · 7.5 CVSS v3.1 Published 2023-06-15
Fix available
A fix is available. Upgrade to 15.4 or later.
See remediation →
84/100
Remediation priority · High
Remotely reachable No privileges Zero-click

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
SolarWinds Serv-U is submitting an HTTP request when changing or updating the attributes for File Share or File request.  Part of the URL of the request discloses sensitive data.

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

SolarWinds Serv-U file transfer server discloses sensitive data in URL parameters when users modify File Share or File request attributes via HTTP requests. The sensitive information is exposed in the request URL, potentially allowing interception or log exposure of credentials, tokens, or other confidential data.

MitigationApply available patches from SolarWinds for Serv-U. Until patched, restrict network access to Serv-U management interfaces and implement URL logging review to identify exposed sensitive data in existing logs.

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
Serv UApplication
Affected:< 15.4

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
None
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/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. Identify Serv-U installation and version
    Locate the Serv-U installation directory and check the version. On Windows, this is typically in C:\Program Files\SolarWinds\Serv-U\ or check the serv-u.exe file properties. On Linux, check /opt/serv-u/ or the rpm/deb package version.
    Affected if The installed version of SolarWinds Serv-U is below 15.4 (e.g., 15.3.x, 15.2.x, earlier versions)
  2. Confirm HTTP management interface is enabled
    Check if Serv-U's web-based administration console is accessible. By default, Serv-U runs an HTTP listener on port 80/443 or port 8080/8443 for management. Verify the service is running and the web interface responds.
    Affected if The Serv-U HTTP management interface is exposed and accessible to users or attackers
  3. Verify File Share or File Request features are active
    Log into the Serv-U admin console and navigate to the File Sharing or File Request configuration areas. Check if these features have been created or enabled for any users or groups.
    Affected if File Share or File Request functionality is enabled and users can modify these attributes via HTTP requests
  4. Inspect URL logging or proxy logs for sensitive data exposure
    Review HTTP access logs from Serv-U, reverse proxy, or web server logs in front of Serv-U. Search for request URLs containing File Share or File Request modification operations (typically POST/PUT requests to /api/v1/fileshare or /api/v1/filerequest endpoints). Look for parameters that may contain credentials, tokens, or sensitive values in the query string.
    Affected if HTTP logs contain URLs with sensitive data (credentials, tokens) in query parameters related to File Share or File Request modifications

The environment is affected if running SolarWinds Serv-U version below 15.4 with the HTTP management interface accessible and File Share or File Request features enabled, where sensitive data may appear in HTTP request URLs.

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.

dbcve · scoped
Upgrade available Upgrade to 15.4 or later
Fixed in 15.4
Interim mitigation

Apply available patches from SolarWinds for Serv-U. Until patched, restrict network access to Serv-U management interfaces and implement URL logging review to identify exposed sensitive data in existing logs.

Recommended fix Moderate confidence

Serv-U 15.4

  1. Upgrade SolarWinds Serv-U to version 15.4 or later to resolve the cleartext transmission vulnerability
  2. After upgrade, verify that HTTP requests for File Share and File Request attributes use HTTPS instead of HTTP
  3. Confirm the sensitive data is no longer disclosed in the URL query parameters

Generated from the published advisory — verify against the referenced sources before acting.

Fix this in Serv U Scoped from the published advisory
  • Consultation4.0 h
  • Implementation8.0 h
  • Testing6.0 h
  • Review / QA3.0 h
21.0 hours of engineering $3,680
Get the upgrade done

An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $5,888.

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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-2023-23841 in production — separate from our analysis above.

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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
  • No weaponised exploit code, or anything meant to cause harm
  • No spam, self-promotion, credentials, or personal data