What is CVE-2021-22291?

CVE-2021-22291 is a high-severity vulnerability in Abb Eibport V3 Knx, classified under Cross-site Scripting. CVSS score: 8.0/10. Published 2025-10-07.

How severe is CVE-2021-22291?

High severity. CVSS v3 base score is 8.0 out of 10.

Is CVE-2021-22291 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

XSS in Abb Eibport V3 Knx

CVE-2021-22291

Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in ABB EIBPORT V3 KNX, ABB EIBPORT V3 KNX GSM.This issue affects EIBPORT V3 KNX: before 3.9.2; EIBPORT V3 KNX GSM: before 3.9.2.

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.003 (22.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.0 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H.

Affected products

Abb Eibport V3 Knx — versions 0
Abb Eibport V3 Knx Gsm — versions 0

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

Public proof-of-concept exploits

fkie-cad/nvd-json-data-feeds

References

cybersecurity@ch.abb.com

Frequently asked questions

What is CVE-2021-22291?: CVE-2021-22291 is a high-severity vulnerability in Abb Eibport V3 Knx, classified under Cross-site Scripting. CVSS score: 8.0/10. Published 2025-10-07.
How severe is CVE-2021-22291?: High severity. CVSS v3 base score is 8.0 out of 10.
Is CVE-2021-22291 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.