CVE-2025-59547
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 · uneditedDNN (formerly DotNetNuke) is an open-source web content management platform (CMS) in the Microsoft ecosystem. Prior to version 10.1.0, the CKEditor file upload endpoint has insufficient sanitization for filenames allowing probing network endpoints. A specially crafted request can be made to upload a file with Unicode characters, which would be translated into a path that could expose resources in the internal network of the hosted site. This issue has been patched in version 10.1.0.
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 confidenceDNN CMS versions prior to 10.1.0 contain a vulnerability in the CKEditor file upload endpoint where filenames are insufficiently sanitized. Attackers can craft requests with Unicode characters in filenames that translate into path-based attacks, potentially exposing resources on the internal network where the DNN site is hosted.
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< 10.1.0CVSS 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
- None
- Availability
- None
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/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 checksWork through these to decide whether this CVE applies to you.
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Identify DNN CMS versionCheck the version of your DNN installation by looking at the About page in the DNN control panel, or inspect the version.xml or Web.config file in the DNN installation directoryAffected if The installed version is any release prior to 10.1.0 (e.g., 10.0.x, 9.x, 8.x, etc.)
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Confirm CKEditor module presenceVerify that the CKEditor module is installed and active on your DNN site by reviewing the installed extensions in the Host > Extensions menuAffected if CKEditor is installed as part of the standard DNN installation and is available for use in content editing
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Check file upload functionality accessibilityReview whether any pages or portals on your DNN site expose the CKEditor file upload endpoint (typically at /Providers/HtmlEditorProviders/DNNConnectCK/Upload or similar paths)Affected if The CKEditor file upload endpoint is accessible without additional authentication beyond standard portal access
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Inspect upload directories for anomalous filesExamine the CKEditor upload folders (usually in /Portals/[portalID]/Uploads or /Providers/HtmlEditorProviders/DNNConnectCK/Upload/) for any files with unusual Unicode characters, double extensions, or path traversal patterns in their namesAffected if Any files exist with Unicode characters or path traversal patterns (such as ..\ or ../) in their filenames within upload directories
Your environment is affected if you are running any DNN version prior to 10.1.0 and the CKEditor file upload functionality is accessible to users.
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.
dbcve · scoped10.1.0
Upgrade DNN to version 10.1.0 or later, which contains the patch addressing the insufficient filename sanitization in the CKEditor module.
10.1.0
- Backup your current DNN installation and database before upgrading.
- Download DNN version 10.1.0 from the official DNN repository (github.com/dnnsoftware/Dnn.Platform) or the official DNN website.
- Follow the standard DNN upgrade process: upload the installation package to your server, extract files, and run the installation/upgrade.
- Verify the CKEditor component has been updated to the patched version.
- Test file upload functionality with the CKEditor to confirm the fix is working.
- Ensure no regression in other CMS functionalities.
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation3.0 h
- Implementation6.0 h
- Testing8.0 h
- Review / QA4.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2025-59547 — 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-2025-59547 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
- No spam, self-promotion, credentials, or personal data