How severe is CVE-2026-53739?

CVE-2026-53739 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity low, and availability none.

Is CVE-2026-53739 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (1st percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2026-53739?

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

Does CVE-2026-53739 have an EU (EUVD) identifier?

Yes. CVE-2026-53739 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-36140.

When was CVE-2026-53739 published?

CVE-2026-53739 was published on 2026-06-10 and last updated on 2026-06-17.

CVE-2026-53739

CVE-2026-53739 is a medium-severity vulnerability with a CVSS 3.x base score of 4.3. 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-352.

Key facts

Severity: Medium (CVSS 3.x base score 4.3)
CVSS v4: 5.1
EPSS exploit prediction: 0% (1st percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-36140
Weakness: CWE-352
Published: 2026-06-10
Last modified: 2026-06-17

Description

Yoast Duplicate Post through 4.6 contains a cross-site request forgery vulnerability in the duplicate_post_dismiss_notice handler, which verifies no nonce or capability. Attackers can trick any authenticated user into sending a request that sets the duplicate_post_show_notice site option, suppressing admin notices network-wide.

Frequently asked questions

What is CVE-2026-53739?: Yoast Duplicate Post through 4.6 contains a cross-site request forgery vulnerability in the duplicate_post_dismiss_notice handler, which verifies no nonce or capability. Attackers can trick any authenticated user into sending a request that sets the duplicate_post_show_notice site option, suppressing admin notices network-wide.
How severe is CVE-2026-53739?: CVE-2026-53739 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity low, and availability none.
Is CVE-2026-53739 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (1st percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2026-53739?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-53739 have an EU (EUVD) identifier?: Yes. CVE-2026-53739 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-36140.
When was CVE-2026-53739 published?: CVE-2026-53739 was published on 2026-06-10 and last updated on 2026-06-17.

References

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