Quick answers
- Is CVE-2026-39638 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-39638 being exploited in the wild.
- How severe is CVE-2026-39638?
- Medium severity, with a CVSS score of 5.9, published 8 April 2026.
- Which products and versions are affected?
- Themeum Qubely <= 1.8.14.
- Is there a fix for CVE-2026-39638?
- No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
- How is CVE-2026-39638 attacked?
- It is attacked over the network, in a software library.
- Am I affected by CVE-2026-39638?
- Check whether you run Themeum Qubely at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Technical details
A Stored Cross-Site Scripting (XSS) vulnerability exists in the Themeum Qubely plugin for WordPress (versions <= 1.8.14) due to improper neutralization of input during web page generation. The flaw allows an attacker with high privileges (such as an Author or Editor) to inject malicious HTML or JavaScript payloads into the site's database. These scripts are subsequently executed in the browser of any user who visits the affected page. Exploitation requires the attacker to have network access to the WordPress administrative interface and necessitates some level of user interaction from a victim. As of the advisory date, no official patch has been confirmed.
Affected products
- Themeum Qubely <= 1.8.14
Timeline
- 2026-01-15: other: Vulnerability reported by researcher Jitlada
- 2026-02-14: advisory: Initial advisory published by Patchstack
- 2026-04-08: disclosed: CVE published to NVD