CVE-2025-20317
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 · uneditedA vulnerability in the Virtual Keyboard Video Monitor (vKVM) connection handling of Cisco Integrated Management Controller (IMC) could allow an unauthenticated, remote attacker to redirect a user to a malicious website. This vulnerability is due to insufficient verification of vKVM endpoints. An attacker could exploit this vulnerability by persuading a user to click a crafted link. A successful exploit could allow the attacker to redirect a user to a malicious webpage and potentially capture user credentials. Note: The affected vKVM client is also included in Cisco UCS Manager.
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 confidenceAn open redirect vulnerability in Cisco IMC's vKVM component allows unauthenticated attackers to craft malicious links that redirect users to arbitrary websites due to insufficient validation of vKVM endpoints. The attacker must persuade a user to click the crafted link, potentially leading to credential theft via phishing.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
CVSS 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
- Low
- Availability
- None
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/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 Cisco IMC installationAccess the BMC/IPMI web interface or check the system for Cisco IMC by navigating to the management IP or checking for the IMC web server port (usually 443/80). Use the command 'ipmitool -I open lan print' or check BMC credentials to confirm IMC presence.Affected if Cisco IMC is present and accessible on the network
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Determine Cisco IMC versionLog into the Cisco IMC web UI and navigate to the Admin tab > Summary page, or use the CLI command 'show version' via IPMI/ssh to the IMC. Locate the firmware/software version number.Affected if The installed IMC version falls within any affected version range (compare to Cisco's official advisory)
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Verify vKVM feature is enabledIn the Cisco IMC web interface, go to Virtual KVM or vKVM settings (typically under Server > Remote Management > vKVM). Check if the Virtual KVM and/or Virtual Media features are currently enabled.Affected if vKVM is enabled and accessible without additional authentication layers
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Inspect vKVM URL parameters for redirect behaviorAccess the vKVM interface via the browser. Observe the URL when clicking any redirect or navigation links within the vKVM console. Look for 'redirect' or 'url' parameters in the vKVM endpoint URLs.Affected if The vKVM endpoints accept arbitrary URL parameters that could cause redirection to external sites
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Check vKVM access controlsReview the IMC user roles and permissions associated with vKVM access. Determine if unauthenticated or low-privilege users can access vKVM endpoints.Affected if vKVM is accessible to unauthenticated users or users without proper network segmentation
A system is affected if it runs Cisco IMC with an unpatched version and has vKVM enabled, allowing crafted links to redirect users to external sites.
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 dataApply Cisco-provided patches for IMC and UCS Manager when available; alternatively, disable vKVM if not required and educate users about avoiding suspicious links.
- Consultation2.0 h
- Implementation4.0 h
- Testing3.0 h
- Review / QA2.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2025-20317 — 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-2025-20317 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