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.
CVE-2026-53740
MEDIUMPre-NVD 5.45.4—
EchelonGraph scoreHIGH confidence
Score 5.4 from GitHub Security Advisory published 2026-06-11. the CNA's CVSS baseline 5.4; sources differ by 0.0.
Triggered by: GitHub Security Advisory CVSS
Sources: cna:vulncheck, epss, ghsa
5.4
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
- Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 5.4Exploit: NoneExposed: 0
No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.
- CVSS v3
- 5.4
- EG Score
- 5.4(high)
- EPSS
- 3.8%
- KEV
- Not listed
Published
June 10, 2026
Last Modified
June 11, 2026
Advisory Details (2)
Auto-updated Jun 16, 2026No patch confirmed yet.
generic
Yoast Duplicate Post through 4.6 Stored Cross-Site Scripting via Scheduled Republish Notice | Advisories | VulnCheck
https://www.vulncheck.com/advisories/yoast-duplicate-post-through-stored-cross-site-scripting-via-scheduled-republish-noticegeneric
Yoast Duplicate Post – WordPress plugin | WordPress.org
https://wordpress.org/plugins/duplicate-post/Vendor Advisories for CVE-2026-53740(1)
These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.
Weakness Classification(1)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Related CVEs(same CWE)
Frequently asked(5)
What is CVE-2026-53740?
CVE-2026-53740 is a medium vulnerability published on June 10, 2026. 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.
When was CVE-2026-53740 disclosed?
CVE-2026-53740 was first published in the National Vulnerability Database on June 10, 2026, with the most recent update on June 11, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-53740 actively exploited?
CVE-2026-53740 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 3.8% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-53740?
CVE-2026-53740 has a CVSS v4.0 base score of 5.4 (CNA self-assessment; NVD's own analysis pending).
How do I remediate CVE-2026-53740?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-53740, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.
Dependency Blast Radius
Explore the affected products and dependency analysis for CVE-2026-53740
Is Your Infrastructure Affected by CVE-2026-53740?
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