CVE-2020-7685
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 · uneditedThis affects all versions of package UmbracoForms. When using the default configuration for upload forms, it is possible to upload arbitrary file types. The package offers a way for users to mitigate the issue. The users of this package can create a custom workflow and frontend validation that blocks certain file types, depending on their security needs and policies.
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 confidenceUmbracoForms has an arbitrary file upload vulnerability in its default configuration, allowing users to upload any file type through forms. This high-severity issue (CVSS 7.5) could enable attackers to upload malicious executables that may be executed on the server.
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 dataall versionsCVSS 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
- None
- Integrity
- High
- Availability
- None
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/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 checksWork through these to decide whether this CVE applies to you.
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Verify UmbracoForms is installedCheck the website's packages or the /App_Plugins/UmbracoForms folder exists in the installation directoryAffected if The UmbracoForms folder or package is present in the environment
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Identify forms with file upload fieldsLog into the Umbraco backoffice, navigate to the Forms section, and review each form for fields of type 'File Upload'Affected if Any form contains a File Upload field and is publicly accessible
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Check the default file type restrictionsIn Umbraco backoffice, go to Settings > Forms > Configuration > File Uploads, or inspect the UmbracoForms.config file in /config/ for AllowedFileTypes settingsAffected if No custom file type whitelist is configured or the allowed types include dangerous extensions like .exe, .php, .asp
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Verify if custom workflows are applied to uploaded filesNavigate to each form with file uploads, open the Workflows section, and check if any workflow validates or restricts file typesAffected if No workflow exists that restricts allowed file types for upload fields
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Confirm the upload folder is web-accessibleCheck the /App_Data/UmbracoForms/FileUploads/ directory is accessible via HTTP and examine what file types can be retrievedAffected if The upload directory is accessible from the web and allows retrieval of uploaded files
If UmbracoForms with file upload fields is installed using default configuration without custom file type restrictions or validation workflows, the environment is affected by CVE-2020-7685.
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 dataImplement custom workflow and frontend validation to restrict allowed file types according to organizational security policies, as no automatic patch is provided by the package.
- Consultation3.0 h
- Implementation6.0 h
- Testing3.0 h
- Review / QA2.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $3,984.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2020-7685 — 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-2020-7685 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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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.
- 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