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CVE Record

CVE-2021-40223: Rittal CMC PU III Web management (version V3.11.00_2) fails to sanitize user input on several parameters of...

Rittal CMC PU III Web management (version V3.11.00_2) fails to sanitize user input on several parameters of the configuration (User Configuration dialog, Task Configuration dialog and set logging filter dialog). This allows an attacker to backdoor the device with HTML and browser-interpreted content (such as JavaScript or other client-side scripts). The XSS payload will be triggered when the user accesses some specific sections of the application.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

CVE-2021-40223 is a cross-site scripting issue in Rittal CMC PU III Web management version V3.11.00_2. Malicious content can be stored in configuration areas and later run in a user's browser when they open affected sections. The supplied sources do not provide a CVSS score, patch version, or evidence of active exploitation.

Executive priority

Treat this as a targeted management-plane risk, not a broad internet emergency based on the supplied evidence. Prioritize identifying exposed Rittal CMC PU III systems, reducing access, and checking vendor remediation because management consoles can influence operational environments.

Technical view

The issue is improper sanitization of several configuration parameters in the User Configuration dialog, Task Configuration dialog, and logging filter settings. Stored HTML or browser-interpreted script can be injected and later executed when specific application sections are viewed. The bundle does not identify CPEs, CWE mapping, authentication requirements, or vendor remediation details.

Likely exposure

Exposure is likely limited to organizations running Rittal CMC PU III Web management V3.11.00_2, especially if administrative access is shared broadly or reachable from less-trusted networks. The supplied affected-product metadata is incomplete, so confirm against local asset inventories.

Exploitation context

The CVE is not listed as CISA KEV in the supplied bundle. A public GitHub reference exists, but the provided evidence does not establish active exploitation. Successful abuse appears to require placing malicious content into vulnerable configuration fields and waiting for a user to view affected sections.

Researcher notes

The public metadata is thin: no CVSS, CWE, normalized CPEs, patch reference, or authentication detail is provided. The description supports stored XSS across multiple configuration dialogs. Avoid assuming broader product impact beyond Rittal CMC PU III Web management V3.11.00_2 unless vendor evidence confirms it.

Mitigation direction

  • Check Rittal guidance for fixed firmware or supported upgrade paths.
  • Restrict CMC PU III Web management access to trusted administration networks.
  • Limit administrator accounts and review who can modify configuration fields.
  • Inspect existing configuration values for unexpected HTML or script-like content.
  • Monitor administrative access logs for suspicious configuration changes.

Validation and detection

  • Inventory Rittal CMC PU III devices and record web management versions.
  • Confirm whether any device runs V3.11.00_2.
  • Verify management interfaces are not exposed to untrusted networks.
  • Review affected configuration dialogs for unexpected embedded browser content.
  • Check vendor advisories before declaring remediation complete.
Prepared
Confidence
medium
Sources
3

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.

ATT&CK lookup starting points

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CVE-2021-40223 mapping review

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Vulnerability profileCVE Program record
Severity
Unknown
CVSS
Not scored
Known Exploited
No
Published
Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors
0Timeline events
0ADP providers
2Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
n/an/an/aListed
Weakness

CWE details

No CWE listed

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.