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CVE-2026-66666: WordPress Core <= 7.1.2 - Unauthenticated Sensitive Data Exposure of Comments on Private and Unpublished Posts via Comment Feed vulnerability

• Severity: medium (CVSS 6.9 v4.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-10-06 · updated 2026-10-06
• Weakness: CWE-201

Description

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.

Affected products

• Automattic 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; from 6.6 through 6.6.9

References

• https://patchstack.com/articles/wordpress-7-1-3-security-release?_s_id=cve
• https://patchstack.com/database/wordpress/wordpress/wordpress/vulnerability/wordpress-wordpress-wordpress-7-1-2-sensitive-data-exposure-vulnerability?_s_id=cve
• https://wordpress.org/news/2026/10/wordpress-7-1-3-maintenance-and-security-release/

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