dbcve.org
Serv UApplication · Solarwinds

CVE-2018-10240

HIGH · 7.3 CVSS v3.0 Published 2018-05-16
Fix available
A fix is available. Upgrade to after 15.1.6 or later.
See remediation →
82/100
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 MFT before 15.1.6 HFv1 assigns authenticated users a low-entropy session token that can be included in requests to the application as a URL parameter in lieu of a session cookie. This session token's value can be brute-forced by an attacker to obtain the corresponding session cookie and hijack the user's session.

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 · high confidence

SolarWinds Serv-U MFT before 15.1.6 HFv1 assigns authenticated users session tokens with insufficient entropy. These tokens can be passed as URL parameters in lieu of session cookies and are vulnerable to brute-force attacks, allowing attackers to derive valid session cookies and hijack user sessions.

MitigationUpgrade to SolarWinds Serv-U MFT version 15.1.6 HFv1 or later, which implements high-entropy session tokens resistant to brute-force attacks.

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:<= 15.1.6

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
Low
Integrity
Low
Availability
Low

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

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. Determine installed Serv-U MFT version
    Locate the Serv-U installation and check the version information typically shown in the application, help menu, or installation directory. Common methods include: right-clicking the Serv-U icon and selecting 'About', checking the 'servu.ini' configuration file, or using the Serv-U Administration interface.
    Affected if The version is 15.1.6 or any earlier version (e.g., 15.1.5, 15.1.4, etc.)
  2. Compare version to affected range
    The affected range is any version <= 15.1.6. If your installed version is 15.1.6 or lower, the weak session token vulnerability is present.
    Affected if Installed version is 15.1.6 or lower

If SolarWinds Serv-U MFT version 15.1.6 or earlier is installed, the environment is vulnerable to insufficient entropy session tokens and URL-based session hijacking.

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
Upgrade available Upgrade to a release after 15.1.6
Interim mitigation

Upgrade to SolarWinds Serv-U MFT version 15.1.6 HFv1 or later, which implements high-entropy session tokens resistant to brute-force attacks.

Fix this in Serv U Scoped from the published advisory
  • Consultation4.0 h
  • Implementation6.0 h
  • Testing3.0 h
  • Review / QA2.0 h
15.0 hours of engineering $2,690
Get the upgrade done

An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $4,304.

Scan for this in your stack

Free · runs locally
dbcve dependency scanner

Check whether your project pulls in CVE-2018-10240 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.

Get it on GitHub Scan in the browser

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-2018-10240 in production — separate from our analysis above.

No notes yet

Be the first to add a field note for this CVE — a mitigation you’ve verified, a version caveat, or a link to a working fix. Sign in above to contribute.

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