CVE-2025-67478

HIGHNVD 8.88.8—

8.8

Vulnerability in Wikimedia Foundation CheckUser. This vulnerability is associated with program files includes/Mail/UserMailer.Php.

This issue affects CheckUser: from * before 1.39.14, 1.43.4, 1.44.1.

CVSS v3: 8.8
EG Score: 8.8(medium)
EPSS: 2.2%
KEV: Not listed

Published

February 3, 2026

Last Modified

April 14, 2026

Advisory Details (1)

Auto-updated May 22, 2026

No patch confirmed yet.

generic

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https://phabricator.wikimedia.org/T385403

Data Freshness Timeline

(refreshed 18× in last 7d / 20× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

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Frequently asked(5)

What is CVE-2025-67478?

CVE-2025-67478 is a high vulnerability published on February 3, 2026. Vulnerability in Wikimedia Foundation CheckUser. This vulnerability is associated with program files includes/Mail/UserMailer.Php. This issue affects CheckUser: from * before 1.39.14, 1.43.4, 1.44.1.

When was CVE-2025-67478 disclosed?

CVE-2025-67478 was first published in the National Vulnerability Database on February 3, 2026, with the most recent update on April 14, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2025-67478 actively exploited?

CVE-2025-67478 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 2.2% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2025-67478?

CVE-2025-67478 has a CVSS v3 base score of 8.8 (NVD).

How do I remediate CVE-2025-67478?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2025-67478, 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.

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CVE-2025-67478

📅 Published

🔄 Last Modified

📋 Advisory Details (1)