XSS in Qcubed
CVE-2017-20288
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.
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- github.com/qcubed/qcubed/issues/1230 (issue-tracking, exploit)
- github.com/projectdiscovery/nuclei-templates/blob/main/http/vulnerabilities/oth… (technical-description)
- www.vulncheck.com/advisories/qcubed-3.1.1-reflected-xss-via-installer-step-2-php (third-party-advisory)
Frequently asked questions
- What is CVE-2017-20288?
- CVE-2017-20288 is a medium-severity vulnerability in Qcubed, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2026-10-22.
- How severe is CVE-2017-20288?
- Medium severity. CVSS v3 base score is 6.1 out of 10.