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M Files WebApplication · M Files

CVE-2021-37254

HIGH · 7.5 CVSS v3.1 Published 2021-10-28
Fix available
A fix is available. Upgrade to 20.10.9445.0 / 20.10.9534.1 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
In M-Files Web product with versions before 20.10.9524.1 and 20.10.9445.0, a remote attacker could use a flaw to obtain unauthenticated access to 3rd party component license key information on server.

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

M-Files Web versions prior to 20.10.9524.1 and 20.10.9445.0 contain an unauthenticated information disclosure vulnerability allowing remote attackers to access sensitive 3rd party component license key information stored on the server through a flaw in the web application.

MitigationApply the vendor-supplied patches (version 20.10.9524.1 or 20.10.9445.0) to remediate this vulnerability.

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
M Files WebApplication
Affected:< 20.10.9445.0>= 20.10.9500.0, < 20.10.9534.1

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 if M-Files Web is running
    Check if M-Files Web is accessible on your network by attempting to access the M-Files web portal URL (typically at port/segment for M-Files Web)
    Affected if M-Files Web is exposed and accessible externally or internally
  2. Check M-Files Web version via Windows installed programs
    Open Windows Control Panel > Programs and Features, or run 'Get-ItemProperty HKLM:\Software\Microsoft\Windows\CurrentVersion\Uninstall\* | DisplayName' to list installed programs, look for M-Files entries and note the version
    Affected if The installed version is below 20.10.9445.0, OR is 20.10.9500.0 through 20.10.9533.x (before 20.10.9534.1)
  3. Check M-Files version via administration interface
    Log into M-Files Admin or M-Files Server Administrator, navigate to the M-Files Web configuration section to view the exact version number
    Affected if The displayed version matches the affected ranges above
  4. Verify M-Files Web module is enabled
    In M-Files Admin, confirm that the M-Files Web (formerly M-Files Server) role is installed and running as a Windows service named 'M-Files Server'
    Affected if The M-Files Web service is running and the version is within the affected ranges

You are affected if M-Files Web is installed and the version is either below 20.10.9445.0 or falls between 20.10.9500.0 and 20.10.9533.x (not including 20.10.9534.1 or later).

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 20.10.9445.0 / 20.10.9534.1 or later
Fixed in 20.10.9445.020.10.9534.1
Interim mitigation

Apply the vendor-supplied patches (version 20.10.9524.1 or 20.10.9445.0) to remediate this vulnerability.

Recommended fix High confidence

M-Files Web version 20.10.9534.1 or later

  1. 1. Identify the current installed version of M-Files Web by checking the M-Files server administration interface or installed programs list
  2. 2. If running a version < 20.10.9445.0 or between 20.10.9500.0 and 20.10.9534.0, plan for upgrade
  3. 3. Before upgrading, backup the M-Files vault and configuration settings
  4. 4. Download M-Files version 20.10.9534.1 or later from the official M-Files download portal at www.m-files.com
  5. 5. Stop all M-Files services before performing the upgrade
  6. 6. Run the M-Files installer and follow the upgrade wizard prompts
  7. 7. After installation, verify the new version by checking the M-Files Administrator or about dialog
  8. 8. Restart M-Files services and verify the application functions normally
Caveat Review M-Files release notes for any configuration or feature changes between your current version and 20.10.9534.1; test in non-production environment first

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

Fix this in M Files Web Scoped from the published advisory
  • Consultation2.0 h
  • Implementation4.0 h
  • Testing3.0 h
  • Review / QA1.0 h
10.0 hours of engineering $1,750
Get the upgrade done

An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $2,800.

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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-2021-37254 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
  • No weaponised exploit code, or anything meant to cause harm
  • No spam, self-promotion, credentials, or personal data