CVE-2025-3086
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 · uneditedImproper isolation of users in M-Files Server version before 25.3.14549 allows anonymous user to affect other anonymous users views and possibly cause a denial of service
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 confidenceM-Files Server before version 25.3.14549 contains an improper isolation vulnerability where anonymous users can affect the views of other anonymous users. This broken access control allows one anonymous session to manipulate shared view state, potentially causing denial of service for other anonymous users.
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< 25.3.14549CVSS 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
- None
- Scope
- Unchanged
- Confidentiality
- None
- Integrity
- Low
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H
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 checksWork through these to decide whether this CVE applies to you.
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Identify M-Files Server versionCheck the installed version of M-Files Server through the M-Files Admin application (Help > About) or by inspecting the server configuration files (typically in the M-Files Server installation directory). The version information is also visible in the M-Files Server Manager console under the server node.Affected if The installed version is lower than 25.3.14549 (for example, 25.2.x, 25.1.x, or earlier releases). Compare your version number to this threshold.
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Verify anonymous access is enabledOpen M-Files Admin and navigate to the authentication settings for the vault or server. Check whether anonymous user authentication is permitted. This is typically found in the Vault Properties under Authentication or in the M-Files Server authentication configuration.Affected if Anonymous access is enabled and users can connect without providing credentials.
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Check for multi-user anonymous sessionsReview whether multiple anonymous users can simultaneously access the same vault or application. Inspect the vault access control lists (ACLs) and verify that anonymous users are granted access. Look at the session management settings in M-Files Admin to confirm concurrent anonymous sessions are allowed.Affected if Multiple anonymous users can establish concurrent sessions to the same vault.
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Inspect shared view state configurationExamine the M-Files Server configuration for view state handling. In M-Files Admin, check the vault settings related to views and whether view state is stored in a shared location accessible across sessions. Look for any configuration that allows view state to be shared between different anonymous user sessions.Affected if View state configuration permits sharing between different anonymous user sessions, or views are stored in a common location accessible by all anonymous users.
You are affected if M-Files Server version is below 25.3.14549 AND anonymous user access is enabled, allowing multiple anonymous users to simultaneously access the system and potentially manipulate shared view state.
Generated from the published advisory. Verify against your own configuration.
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 data25.3.14549
Upgrade M-Files Server to version 25.3.14549 or later. Prior to upgrading, backup the current configuration and test the upgrade in a non-production environment to ensure compatibility with existing workflows.
- Consultation3.0 h
- Implementation4.0 h
- Testing4.0 h
- Review / QA2.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2025-3086 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2025-3086 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
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- 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
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