CVE-2023-40290Network attack vector

Administrator-session script execution via phishing link

Published Mar 27, 2024 · Updated Oct 28, 2024

Cross-site scripting in Supermicro X11SSM-F, X11SAE-F, and X11SSE-F firmware 1.66 allows remote attackers to execute script in IE11. Supermicro has not published the affected BMC web-server endpoint or how it places attacker-controlled input into a generated page. Exploitation requires a BMC administrator who is still authenticated to the web UI to open a phishing link in Internet Explorer 11 on Windows, allowing script to run in that administrator's browser context.

CVSS severity8.3
High
EPSS probability0.66%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cross-site scripting in Supermicro X11SSM-F, X11SAE-F, and X11SSE-F firmware 1.66 allows remote attackers to execute script in IE11. Supermicro has not published the affected BMC web-server endpoint or how it places attacker-controlled input into a generated page. Exploitation requires a BMC administrator who is still authenticated to the web UI to open a phishing link in Internet Explorer 11 on Windows, allowing script to run in that administrator's browser context.

The record

CVE
CVE-2023-40290
Published
Mar 27, 2024
Updated
Oct 28, 2024
Vendor
Supermicro
Product
X11SSE-F Firmware
Classifications
CWE-79, T1204.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 27, 2024CVE publishedPublication date reported by the CVE source.
  2. Oct 28, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=1.66

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Supermicro · X11SSE-F Firmwareversion=1.66
Supermicro · X11SSM-F Firmwareversion=1.66
Supermicro · X11SAE-F Firmwareversion=1.66

Published CVSS scores

8.3CISA-ADPCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1204.001Malicious Link

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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