CVE-2017-20288 QCubed 3.1.1 Reflected XSS via installer step_2.php

Medium 5.1 Published 22 Oct 2026 Updated 29 Oct 2026

Exploited in the wild: Not known
Fix: None listed

What is CVE-2017-20288?

CVE-2017-20288 is a medium-severity vulnerability in QCubed, published on 22 Oct 2026.

Official description

QCubed 2.2.0 through 3.1.1 contains a reflected cross-site scripting vulnerability that allows unauthenticated attackers to inject scripts through the installation_path parameter. Attackers can craft GET requests to /assets/php/_devtools/installer/step_2.php with malicious installation_path values echoed unescaped, executing JavaScript in victims' browsers. Exploitation evidence was first observed by the Shadowserver Foundation on 2023-10-20.

Weakness: CWE-79

Which versions are affected by CVE-2017-20288?

How do I fix CVE-2017-20288?

No fix has been published for CVE-2017-20288 yet. Limit exposure of the affected software until one is available.

Is CVE-2017-20288 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2017-20288 exists.

Sources

Also known as GHSA-x88m-7355-jxw8.