CVE-2026-66666

MEDIUM

6.9

CVSS v4

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.

CWE-201

How to fix

Remediation Available

wordpressDebian

Fixed in:7.1.3+dfsg1-1CVE-2026-66666

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Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v4 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

Impact

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Exploit Intelligence

0.29%probability of exploitation in 30 days

21stpercentile

Low risk: more likely to be exploited than 21% of all known CVEs.

References

Other references3

Related Vulnerabilities

Other CWE-201 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2025-60188	High	7.5	3.7%	-	-
CVE-2022-27779	Medium	5.3	2.8%	-	Fix
CVE-2017-16026	Medium	5.9	2.6%	-	Fix
CVE-2017-2582	Medium	6.5	2.4%	-	Fix
CVE-2020-26085	Critical	9.9	2.3%	-	Fix
CVE-2024-32825	High	7.5	2.0%	-	-

Common questions

How do I fix CVE-2026-66666?

Upgrade wordpress on debian unstable to 7.1.3+dfsg1-1 or later.

Is CVE-2026-66666 being actively exploited?

Not that we know of. CVE-2026-66666 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 0.29% is the estimated probability that it will be exploited in the next 30 days. That is higher than 21% of all scored CVEs.

How severe is CVE-2026-66666?

CVE-2026-66666 has a CVSS v4 base score of 6.9, rated medium. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.

What does CVE-2026-66666 affect?

Published advisories record a fix for wordpress (Debian). Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.

Embed a live status badge for CVE-2026-66666

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-10-06.