CVE-2017-20288
QCubed 3.1.1 Reflected XSS via installer step_2.php
- State
- Published
- Severity
- 5.1 Medium
- Published
- Oct 22, 2026
- Updated
- Oct 29, 2026
- Reserved
- Oct 14, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 5.1 Medium | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N | VulnCheck |
| 3.1 | 6.1 Medium | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N | VulnCheck |
Weaknesses
- CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Affected Products
| Product | Versions |
|---|---|
QCubedQCubed |
|
References
- GitHub issue #1230issue-trackingexploit
- Nuclei Templatetechnical-description
- VulnCheck Advisory: QCubed 3.1.1 Reflected XSS via installer step_2.phpthird-party-advisory
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