CVE-2021-26682
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 remote reflected cross-site scripting (XSS) vulnerability was discovered in Aruba ClearPass Policy Manager version(s): Prior to 6.9.5, 6.8.8-HF1, 6.7.14-HF1. A vulnerability in the guest portal interface of ClearPass could allow a remote attacker to conduct a reflected cross-site scripting (XSS) attack against a user of the portal. A successful exploit could allow an attacker to execute arbitrary script code in a victim’s browser in the context of the guest portal interface.
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 confidenceA remote reflected cross-site scripting (XSS) vulnerability exists in the guest portal interface of Aruba ClearPass Policy Manager. Attackers can craft malicious URLs containing script code that gets reflected back and executed in victims' browsers when they interact with the crafted link, allowing session hijacking or actions performed in the context of the portal.
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< 6.7.14>= 6.8.0, < 6.8.8>= 6.9.0, < 6.9.5= 6.7.14= 6.8.8CVSS 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 installed ClearPass Policy Manager versionLog into the ClearPass admin web interface and navigate to Administration > About, or run the CLI command 'show version' to retrieve the exact version numberAffected if The installed version is less than 6.7.14, or is 6.8.0 through 6.8.7, or is 6.9.0 through 6.9.4, or is exactly 6.7.14 (unpatched)
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Confirm guest portal is accessibleAttempt to access the guest portal URL (typically https://<clearpass-host>/guest) using a web browser or curl. Check if the page loads and presents a login or registration formAffected if The guest portal interface responds with a login or registration page, indicating the feature is enabled and exposed
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Verify the guest portal endpoint reflects user inputCraft a test URL such as https://<clearpass-host>/guest?test=<script>alert(1)</script> and observe if the script tags appear unescaped in the page source or trigger an alertAffected if The URL parameter value is reflected verbatim in the HTML response without proper encoding, confirming the XSS condition exists
The environment is affected if ClearPass Policy Manager version is unpatched (below 6.7.14-HF1/6.8.8-HF1 or below 6.9.5) AND the guest portal interface is accessible and reflects URL parameters unsanitized.
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 data6.7.146.8.86.9.5
Upgrade ClearPass Policy Manager to version 6.9.5, 6.8.8-HF1, or 6.7.14-HF1 (or later) to remediate the reflected XSS vulnerability in the guest portal.
- Consultation2.0 h
- Implementation3.0 h
- Testing2.0 h
- Review / QA1.0 h
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Free · runs locallyCheck whether your project pulls in CVE-2021-26682 — 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-2021-26682 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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- Version or environment caveats, and links to real fixes
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