CVE-2021-40223

MEDIUM

Rittal CMC PU III Web <V3.11.00_2 - XSS

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2021-40223. PoCs published by asang17.

AI-analyzed exploit summary This repository provides a detailed technical summary of CVE-2021-40223, a stored XSS vulnerability in Rittal CMC PU III Web management. It describes the lack of input sanitization in the Security User configuration dialog and Task tab, leading to persistent XSS in logs.

Description

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.

Exploits (1)

nomisec WRITEUP
by asang17 · poc
https://github.com/asang17/CVE-2021-40223

This repository provides a detailed technical summary of CVE-2021-40223, a stored XSS vulnerability in Rittal CMC PU III Web management. It describes the lack of input sanitization in the Security User configuration dialog and Task tab, leading to persistent XSS in logs.

Classification
Writeup 90%
Attack Type
Xss
Complexity
Trivial
Reliability
Reliable
Target: Rittal CMC PU III Web management V3.11.00_2
Auth required
Prerequisites: Access to the web management interface with a valid or hijacked session
devstral-2 · analyzed Feb 19, 2026 Full analysis →

References (1)

Core 1
Core References
Exploit, Third Party Advisory x_refsource_misc
https://github.com/asang17/CVE-2021-XSS

Scores

CVSS v3 5.4
EPSS 0.0025
EPSS Percentile 48.0%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

Details

CWE
CWE-79
Status published
Products (1)
rittal/cmc_pu_iii_7030.000_firmware 3.11.00_2 - 3.17.10
Published Sep 09, 2021
Tracked Since Feb 18, 2026