Identity Services EngineApplication · Cisco
CVE-2017-6734
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 web-based management interface of Cisco Identity Services Engine (ISE) Software could allow an authenticated, remote attacker to conduct a cross-site scripting (XSS) attack against a user of the web interface of an affected device, related to the Guest Portal. More Information: CSCvd74794. Known Affected Releases: 1.3(0.909) 2.1(0.800).
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 confidenceCross-site scripting (XSS) vulnerability in Cisco Identity Services Engine's Guest Portal web interface. An authenticated, remote attacker can inject malicious JavaScript code that executes in the browsers of other users viewing the Guest Portal, potentially allowing session hijacking or credential theft.
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
Identity Services EngineApplication
= 1.3\(0.722\)= 1.3\(0.876\)= 1.3\(0.909\)= 1.3\(106.146\)= 1.3\(120.135\)= 2.1\(0.474\)= 2.1\(0.800\)= 2.1\(102.101\)= 2.1_baseCVSS 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
- Low
- User interaction
- Required
- Scope
- Changed
- Confidentiality
- Low
- Integrity
- Low
- Availability
- None
CVSS:3.0/AV:N/AC:L/PR:L/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 Cisco ISE versionLog into the Cisco ISE admin GUI and navigate to Administration > System > Licensing, or use the CLI command 'show version' to retrieve the installed software version.Affected if The installed version matches any of: 1.3(0.722), 1.3(0.876), 1.3(0.909), 1.3(106.146), 1.3(120.135), 2.1(0.474), 2.1(0.800), 2.1(102.101), or 2.1_base.
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Confirm Guest Portal is enabledIn the Cisco ISE admin GUI, navigate to Guest Access > Portal Settings > Guest Portal to verify whether any Guest Portal type (Sponsor, Self-Registered, or Sponsored) is configured and enabled.Affected if Any Guest Portal is active, as the XSS flaw exists within the Guest Portal web interface.
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Verify web interface accessConfirm that the Guest Portal is accessible to unauthenticated or externally-facing users by checking the portal configuration under Guest Access > Portal Settings and reviewing the allowed access settings.Affected if The Guest Portal web interface is reachable over the network, allowing the injected script to be delivered to victim browsers.
You are affected if your Cisco ISE version matches any of the listed affected versions AND the Guest Portal feature is enabled and accessible.
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 the Cisco patch referenced in CSCvd74794 or upgrade to a fixed release beyond 2.1(0.800). Refer to official Cisco security advisories for the complete list of fixed versions.
Fix this in Identity Services Engine
Scoped from the published advisory
- Consultation3.0 h
- Implementation4.0 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 $3,408.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2017-6734 — 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-2017-6734 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
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