What is CVE-2026-39638?

CVE-2026-39638 is a medium-severity vulnerability in Themeum Qubely, classified under Cross-site Scripting. CVSS score: 5.9/10. Published 2026-04-08.

How severe is CVE-2026-39638?

Medium severity. CVSS v3 base score is 5.9 out of 10.

XSS in Themeum Qubely

CVE-2026-39638

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Themeum Qubely qubely allows Stored XSS.This issue affects Qubely: from n/a through <= 1.8.14.

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.000 (11.0th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:L.

Affected products

Themeum Qubely — versions 0

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

patchstack.com/database/Wordpress/Plugin/qubely/vulnerability/wordpress-qubely-… (vdb-entry)

Frequently asked questions

What is CVE-2026-39638?: CVE-2026-39638 is a medium-severity vulnerability in Themeum Qubely, classified under Cross-site Scripting. CVSS score: 5.9/10. Published 2026-04-08.
How severe is CVE-2026-39638?: Medium severity. CVSS v3 base score is 5.9 out of 10.