CVE-2025-59548
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, specially crafted URLs to the FileBrowser are vulnerable to javascript injection, affecting any unsuspecting user clicking such link. 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 · high confidenceDNN CMS versions prior to 10.1.0 contain a reflected cross-site scripting (XSS) vulnerability in the FileBrowser component. Attackers can inject malicious JavaScript through specially crafted URLs that execute when users click on malicious links.
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
- Required
- Scope
- Changed
- Confidentiality
- Low
- Integrity
- Low
- Availability
- None
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/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 the installed DNN versionLocate the DNN version information typically found in the Admin or Host menu under About, or check the web.config file for the version assembly reference. Compare this version number to 10.1.0.Affected if The installed version is below 10.1.0 (any version prior to 10.1.0 is affected)
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Confirm the FileBrowser component is presentVerify that the FileBrowser module or feature is installed and available in the DNN instance. This is typically found under the Admin menu or as part of the File Manager functionality.Affected if The FileBrowser component exists in the installation
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Check if FileBrowser is accessible to usersReview the module permissions and role settings for the FileBrowser to determine which user roles can access it. Check if anonymous or low-privilege users have access.Affected if Unauthenticated users or low-privilege users can access the FileBrowser
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Examine web server logs for suspicious URL patternsReview IIS or DNN logs for requests containing unusual query parameters in paths related to FileBrowser, such as unexpected script tags or javascript: payloads in URL parameters.Affected if Logs contain requests with XSS payloads targeting the FileBrowser endpoint
The environment is affected if the DNN installation version is below 10.1.0 and the FileBrowser component is accessible to users who could be tricked into clicking malicious links.
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 to obtain the patched code. Users should avoid clicking untrusted links until the upgrade is applied.
10.1.0
- 1. Back up your existing DNN installation, including the database and all files.
- 2. Review the official DNN upgrade documentation for your current version.
- 3. Download DNN version 10.1.0 from the official DNN download source (dnnsoftware.com or the GitHub releases page).
- 4. Place the site in maintenance mode or take it offline.
- 5. Extract the upgrade package and replace the core DNN files, preserving your configuration files and custom modules.
- 6. Run the upgrade process by accessing the site, which will execute any database migrations.
- 7. Verify the FileBrowser functionality works correctly after the upgrade.
- 8. Test that the XSS vulnerability in the FileBrowser URL parameters is no longer exploitable.
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation2.0 h
- Implementation4.0 h
- Testing2.0 h
- Review / QA1.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2025-59548 — 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-2025-59548 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