What’s Vulnerable › Vulnerabilities

CVE-2021-40223

• Severity: medium (CVSS 5.4 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.6% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2021-09-09 · updated 2026-06-17
• Weakness: CWE-79

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.

Affected products

• Rittal Cmc Pu Iii 7030.000 Firmware: from 3.11.00_2 before 3.17.10 — fixed in 3.17.10

How to fix

Upgrade to a fixed version: Rittal Cmc Pu Iii 7030.000 Firmware 3.17.10. Check the vendor advisory for mitigations.

References

• https://github.com/asang17/CVE-2021-XSS
• https://github.com/asang17/CVE-2021-XSS

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