How severe is CVE-2026-66665?

CVE-2026-66665 has a CVSS 3.x base score of 10.0, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-66665 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (22nd percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2026-66665?

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

When was CVE-2026-66665 published?

CVE-2026-66665 was published on 2026-08-06 and last updated on 2026-08-12.

CVE-2026-66665

CVE-2026-66665 is a critical-severity vulnerability with a CVSS 3.x base score of 10.0. 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-434.

Key facts

Severity: Critical (CVSS 3.x base score 10.0)
EPSS exploit prediction: 0% (22nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-434
Published: 2026-08-06
Last modified: 2026-08-12

Description

Unauthenticated Arbitrary File Upload in Type Hub <= 2.0.6 versions.

Frequently asked questions

What is CVE-2026-66665?: Unauthenticated Arbitrary File Upload in Type Hub <= 2.0.6 versions.
How severe is CVE-2026-66665?: CVE-2026-66665 has a CVSS 3.x base score of 10.0, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-66665 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (22nd percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2026-66665?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2026-66665 published?: CVE-2026-66665 was published on 2026-08-06 and last updated on 2026-08-12.

References

https://patchstack.com/database/wordpress/plugin/typehub/vulnerability/wordpress-type-hub-plugin-2-0-6-arbitrary-file-upload-vulnerability?_s_id=cve

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