CVE-2021-22291 EIBPORT Reflected XSS
Reflected XSS in ABB EIBPORT V3 KNX devices allows attackers to execute scripts in user browsers, potentially leading to session hijacking or malicious actions.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2021-22291?
CVE-2021-22291 is a high-severity cross-site scripting vulnerability in ABB EIBPORT V3 KNX, published on 7 Oct 2025. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official description
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.
Weakness: CWE-79
Which versions are affected by CVE-2021-22291?
How do I fix CVE-2021-22291?
No fix has been published for CVE-2021-22291 yet. Limit exposure of the affected software until one is available.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2021-22291 being exploited?
There is no known exploitation of CVE-2021-22291 in the wild and no public exploit code.
Sources
Also known as GHSA-xmxj-3326-2879.