How severe is CVE-2026-53740?

CVE-2026-53740 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2026-53740 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (4th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2026-53740?

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

Does CVE-2026-53740 have an EU (EUVD) identifier?

Yes. CVE-2026-53740 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-36141.

When was CVE-2026-53740 published?

CVE-2026-53740 was published on 2026-06-10 and last updated on 2026-06-17.

CVE-2026-53740

CVE-2026-53740 is a medium-severity vulnerability with a CVSS 3.x base score of 5.4. 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 5.4)
CVSS v4: 5.1
EPSS exploit prediction: 0% (4th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-36141
Weakness: CWE-79
Published: 2026-06-10
Last modified: 2026-06-17

Description

Yoast Duplicate Post through 4.6 inserts an unescaped post title and permalink into the Classic Editor scheduled republish notice. Attackers can schedule a republish copy with a crafted title to execute script when an administrator views the resulting notice.

Frequently asked questions

What is CVE-2026-53740?: Yoast Duplicate Post through 4.6 inserts an unescaped post title and permalink into the Classic Editor scheduled republish notice. Attackers can schedule a republish copy with a crafted title to execute script when an administrator views the resulting notice.
How severe is CVE-2026-53740?: CVE-2026-53740 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2026-53740 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (4th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2026-53740?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-53740 have an EU (EUVD) identifier?: Yes. CVE-2026-53740 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-36141.
When was CVE-2026-53740 published?: CVE-2026-53740 was published on 2026-06-10 and last updated on 2026-06-17.

References

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