CVE-2023-40284
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 · uneditedAn issue was discovered on Supermicro X11SSM-F, X11SAE-F, and X11SSE-F 1.66 devices. An attacker could exploit an XSS issue.
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 Supermicro X11SSM-F, X11SAE-F, and X11SSE-F firmware version 1.66 allows an attacker to inject malicious scripts through the web interface. The high CVSS score indicates potential for significant impact including 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= 1.66= 1.66= 1.66CVSS 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
- High
- Privileges
- None
- User interaction
- Required
- Scope
- Changed
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H
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 Supermicro board modelAccess the BMC/IPMI web interface or CLI and retrieve the system board model information. In IPMI, use 'ipmitool -I lanplus -H <bmc_ip> -U <user> raw' or check the web UI dashboard for the board model number (X11SSM-F, X11SAE-F, or X11SSE-F).Affected if The board model is X11SSM-F, X11SAE-F, or X11SSE-F.
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Check the installed firmware versionIn the BMC/IPMI web interface, navigate to the Firmware Update or Maintenance section to view the current firmware version. Alternatively, use IPMI command: 'ipmitool -I lanplus -H <bmc_ip> -U <user> mc info' to retrieve firmware version information.Affected if The firmware version displayed is exactly 1.66.
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Verify the web interface is enabledConfirm that the BMC web management interface is accessible and enabled. Check via IPMI: 'ipmitool -I lanplus -H <bmc_ip> -U <user> raw 0x32 0x69' or access the web interface URL (https://<bmc_ip>) in a browser. The vulnerability requires the web interface to be active.Affected if The BMC web interface is accessible and operational.
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Confirm no compensating controls are in placeReview network access controls to determine if the BMC web interface is exposed to untrusted networks. Check if input validation or web application firewalls are configured. This check is informational since the vulnerability exists regardless, but helps assess actual exposure.Affected if The web interface is directly accessible from untrusted networks without additional filtering.
A system is affected if it is an X11SSM-F, X11SAE-F, or X11SSE-F board running firmware version 1.66 with the BMC web interface enabled.
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 available firmware patch from Supermicro; if unavailable, restrict network access to the management interface and implement input validation/encoding as compensating controls.
- 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-2023-40284 — 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-2023-40284 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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