CVE-2026-66666

medium CVSS 6.9 EPSS 0.3%

Insertion of Sensitive Information Into Sent Data vulnerability in Automattic WordPress allows Retrieve Embedded Sensitive Data. This issue affects WordPress: from 7.1 through 7.1.2, from 7.0 through 7.0.6, from 6.9 through 6.9.9, from 6.8 through 6.8.10, from 6.7 through 6.7.9, and from 6.6 through 6.6.9.

Versions it affects

Software versions checked with the free lookup that CVE-2026-66666 applies to, and the release that fixes it where the sources name one.

WordPress 7.1.2 WordPress 7.1.0 WordPress 7.0

At a glance

Severity: Medium
CVSS base score: 6.9 out of 10
Known exploited: Not in CISA's catalogue of exploited vulnerabilities
EPSS: 0.3% probability of exploitation in the next 30 days, higher than 20% of scored vulnerabilities
Weakness: CWE-201
Published: 2026-10-06

NVD CVE.org

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