How severe is CVE-2026-39447?

CVE-2026-39447 has a CVSS 3.x base score of 7.1, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability low.

Is CVE-2026-39447 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (15th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2026-39447?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-39447 have an EU (EUVD) identifier?

Yes. CVE-2026-39447 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-36927.

When was CVE-2026-39447 published?

CVE-2026-39447 was published on 2026-06-15 and last updated on 2026-06-17.

CVE-2026-39447

CVE-2026-39447 is a high-severity vulnerability with a CVSS 3.x base score of 7.1. 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: High (CVSS 3.x base score 7.1)
EPSS exploit prediction: 0% (15th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-36927
Weakness: CWE-79
Published: 2026-06-15
Last modified: 2026-06-17

Description

Unauthenticated Cross Site Scripting (XSS) in Simply Schedule Appointments <= 1.6.10.6 versions.

Frequently asked questions

What is CVE-2026-39447?: Unauthenticated Cross Site Scripting (XSS) in Simply Schedule Appointments <= 1.6.10.6 versions.
How severe is CVE-2026-39447?: CVE-2026-39447 has a CVSS 3.x base score of 7.1, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability low.
Is CVE-2026-39447 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (15th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2026-39447?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-39447 have an EU (EUVD) identifier?: Yes. CVE-2026-39447 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-36927.
When was CVE-2026-39447 published?: CVE-2026-39447 was published on 2026-06-15 and last updated on 2026-06-17.

References

https://patchstack.com/database/wordpress/plugin/simply-schedule-appointments/vulnerability/wordpress-simply-schedule-appointments-plugin-1-6-10-6-cross-site-scripting-xss-vulnerability?_s_id=cve

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