CVE-2021-20660
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 · uneditedCross-site scripting vulnerability in SolarView Compact SV-CPT-MC310 prior to Ver.6.5 allows an attacker to inject an arbitrary script via unspecified vectors.
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 confidenceCross-site scripting (XSS) vulnerability in SolarView Compact SV-CPT-MC310 web interface allows an attacker to inject arbitrary JavaScript or HTML scripts via unsanitized user input, potentially compromising session cookies or performing actions on behalf of authenticated users.
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< 6.5CVSS 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 device modelAccess the web interface or check device documentation to confirm the product is SolarView Compact SV-CPT-MC310. This may be visible on the login page or in a system status/settings page.Affected if The device is not SolarView Compact SV-CPT-MC310, then this CVE does not apply.
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Check the firmware versionNavigate to the web interface settings or system information page to locate the firmware version. Alternatively, check device documentation or administrative interfaces for version information.Affected if The installed firmware version is less than 6.5 (for example, 6.4, 6.3, etc.), placing it within the affected range.
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Verify web interface is enabledConfirm that the web interface functionality is active on the device. This is typically the default state but can be checked by accessing the device IP address via HTTP/HTTPS in a browser.Affected if The web interface is accessible and active, which is required for the XSS vulnerability to be exploitable.
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Assess network accessibilityDetermine if the web interface is exposed to network access beyond the intended local network segment, or if it is accessible from untrusted networks.Affected if The web interface is reachable from network segments where untrusted users could potentially inject malicious input.
You are affected if the device is SolarView Compact SV-CPT-MC310 with firmware version below 6.5 and the web interface is 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 data6.5
Update SolarView Compact SV-CPT-MC310 to Ver.6.5 or later to remediate the vulnerability. If immediate update is not possible, restrict network access to the device and implement input validation on any accessible web endpoints.
- Consultation4.0 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-2021-20660 — 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-2021-20660 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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