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Vulnerability · Published Oct 6, 2026 · Assigned by Patchstack

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= 7.1.2 - Unauthenticated Sensitive Data Exposure of Comments on Private and Unpublished Posts via Comment Feed vulnerability

Medium 6.9

In plain English

A medium-severity security flaw in WordPress from Automattic. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 35% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 4.0)6.9Medium
Exploit odds (30 days)0.4%top 65.3% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official 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 packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12wordpressno fix listedDEBIAN-CVE-2026-66666
Debian:13wordpress6.8.12+dfsg1-0+deb13u1DEBIAN-CVE-2026-66666
Debian:14wordpress7.1.3+dfsg1-1DEBIAN-CVE-2026-66666
Ubuntu:22.04:LTSwordpressno fix listedUBUNTU-CVE-2026-66666
Ubuntu:24.04:LTSwordpressno fix listedUBUNTU-CVE-2026-66666
Ubuntu:26.04:LTSwordpressno fix listedUBUNTU-CVE-2026-66666
Ubuntu:26.10wordpressno fix listedUBUNTU-CVE-2026-66666

Affected products (as reported)

VendorProductVersions
Automattic WordPress 7.1 – through 7.1.27.0 – through 7.0.66.9 – through 6.9.96.8 – through 6.8.106.7 – through 6.7.96.6 – through 6.6.9

Weakness: CWE-201 · Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N

References