How severe is CVE-2026-39638?

CVE-2026-39638 has a CVSS 3.x base score of 5.9, rated medium severity. It is exploitable over network with low attack complexity, requires high privileges and user interaction. Impact on confidentiality is low, integrity low, and availability low.

Is CVE-2026-39638 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (7th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2026-39638?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-39638 have an EU (EUVD) identifier?

Yes. CVE-2026-39638 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-20296.

When was CVE-2026-39638 published?

CVE-2026-39638 was published on 2026-04-08 and last updated on 2026-06-17.

CVE-2026-39638

CVE-2026-39638 is a medium-severity vulnerability with a CVSS 3.x base score of 5.9. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-79.

Key facts

Severity: Medium (CVSS 3.x base score 5.9)
EPSS exploit prediction: 0% (7th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-20296
Weakness: CWE-79
Published: 2026-04-08
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is 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.
How severe is CVE-2026-39638?: CVE-2026-39638 has a CVSS 3.x base score of 5.9, rated medium severity. It is exploitable over network with low attack complexity, requires high privileges and user interaction. Impact on confidentiality is low, integrity low, and availability low.
Is CVE-2026-39638 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (7th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2026-39638?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-39638 have an EU (EUVD) identifier?: Yes. CVE-2026-39638 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-20296.
When was CVE-2026-39638 published?: CVE-2026-39638 was published on 2026-04-08 and last updated on 2026-06-17.

References

https://patchstack.com/database/Wordpress/Plugin/qubely/vulnerability/wordpress-qubely-plugin-1-8-14-cross-site-scripting-xss-vulnerability?_s_id=cve

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