CVE-2025-21104
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 · uneditedDell NetWorker, versions prior to 19.11.0.4 and version 19.12, contains an URL Redirection to Untrusted Site ('Open Redirect') Vulnerability in NetWorker Management Console. An unauthenticated attacker with remote access could potentially exploit this vulnerability, leading to a targeted application user being redirected to arbitrary web URLs. The vulnerability could be leveraged by attackers to conduct phishing attacks that cause users to divulge sensitive information.
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 confidenceOpen redirect vulnerability in Dell NetWorker Management Console allows unauthenticated attackers to craft malicious URLs that redirect victims to arbitrary websites, enabling phishing attacks to steal sensitive information.
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< 19.11.0.4= 19.12CVSS 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
- Unchanged
- Confidentiality
- High
- Integrity
- None
- Availability
- None
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/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 checksWork through these to decide whether this CVE applies to you.
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Determine installed NetWorker versionRun 'nsrversion -v' or check the NetWorker installation directory for version information, or query the NetWorker server via 'nsradmin -s hostname -p 390001 -c show'Affected if Installed version is lower than 19.11.0.4 or exactly 19.12
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Confirm NetWorker Management Console component is presentCheck if NMConsole web interface is installed by looking for the Management Console service or web application directory (typically in the NetWorker install path under 'nmconsole' or 'web' folders)Affected if NetWorker Management Console is installed and accessible on the system
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Verify Management Console is network accessibleAttempt to reach the NMConsole web interface via browser or curl at the typical ports (usually 9000 or 8443 for HTTPS) - check if the endpoint respondsAffected if The Management Console web interface is exposed and reachable over the network
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Check for open redirect behavior in NMConsole URLsInspect NMConsole login page URL for a 'redirect' or 'url' parameter; test with a benign external URL (e.g., https://example.com) to confirm redirection occurs without validationAffected if The NMConsole accepts and follows a redirect parameter to an arbitrary external domain
You are affected if your NetWorker version is less than 19.11.0.4 or exactly 19.12 AND the NetWorker Management Console is accessible, allowing unauthenticated attackers to craft malicious redirect URLs.
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 · scoped19.11.0.4
Update Dell NetWorker to version 19.11.0.4 or later to patch the open redirect vulnerability in the NetWorker Management Console.
19.11.0.4 or later
- 1. Identify current Dell NetWorker version by checking the NetWorker Management Console or running 'nsrversion' command
- 2. Download Dell NetWorker version 19.11.0.4 or later from Dell Support at www.dell.com/support
- 3. Review Dell NetWorker upgrade documentation and release notes for version 19.11.0.4
- 4. Create a full backup of the NetWorker server and client data
- 5. Test the upgrade in a non-production/staging environment first
- 6. Schedule maintenance window for the upgrade
- 7. Stop all NetWorker services before upgrading
- 8. Install NetWorker 19.11.0.4 using Dell's standard installation procedure
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation4.0 h
- Implementation8.0 h
- Testing6.0 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 $5,600.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2025-21104 — 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-2025-21104 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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