CVE-2026-66666
WordPress Core <= 7.1.2 - Unauthenticated Sensitive Data Exposure of Comments on Private and Unpublished Posts via Comment Feed vulnerability
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.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- Low
- Integrity
- None
- Availability
- None
Exploit likelihood
What each source reports
CVE List Score used
WordPress Core <= 7.1.2 - Unauthenticated Sensitive Data Exposure of Comments on Private and Unpublished Posts via Comment Feed vulnerability
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.
- Record
CVE-2026-66666- CVSS 4.0
- 6.9 Medium
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 - Weakness
- CWE-201
- Updated
- 2026-11-02
EUVDEUVD-2026-93555
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.
- Record
EUVD-2026-93555- CVSS 4.0
- 6.9 Medium
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 - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-vxpf-4h6r-qjx4
Insertion of Sensitive Information Into Sent Data vulnerability in Automattic WordPress wordpress...
Insertion of Sensitive Information Into Sent Data vulnerability in Automattic WordPress wordpress allows Retrieve Embedded Sensitive Data.This issue affects WordPress: from n/a through 7.1.2.
- Record
GHSA-vxpf-4h6r-qjx4- CVSS 4.0
- 6.9 Medium
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 - Weakness
- CWE-201
- Updated
- 2026-11-02
NVD
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.
- Record
CVE-2026-66666- CVSS 4.0
- 6.9 Medium
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 - Weakness
- CWE-201
- Updated
- 2026-11-02
OSVDEBIAN-CVE-2026-66666
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.
- Record
DEBIAN-CVE-2026-66666- CVSS 4.0
- 6.9 Medium
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 - Updated
- 2026-11-02
OSVUBUNTU-CVE-2026-66666
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.
- Record
UBUNTU-CVE-2026-66666- CVSS 4.0
- 6.9 Medium
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 - Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
wordpressDebian:12 |
All versions, plus listed versions 6.1.1+dfsg1-16.1.6+dfsg1-0+deb12u16.1.9+dfsg1-0+deb12u16.2+dfsg1-16.2.1+dfsg1-1 Show 27 moreShow less6.2.2+dfsg1-16.3+dfsg1-16.3.1+dfsg1-16.3.2+dfsg1-16.4.1+dfsg1-16.4.1+dfsg1-1.16.4.2+dfsg1-16.4.3+dfsg1-16.5+dfsg1-16.5.2+dfsg1-16.5.3+dfsg1-16.5.5+dfsg1-16.6.1+dfsg1-16.7.2+dfsg1-16.7.2+dfsg1-1.16.8.1+dfsg1-16.8.3+dfsg1-16.9+dfsg1-16.9.4+dfsg1-17.0+dfsg1-17.0.2+dfsg1-17.0.3+dfsg1-17.1+dfsg1-17.1.1+dfsg1-17.1.2+dfsg1-17.1.3+dfsg1-17.1.4+dfsg1-1 |
None known |
wordpressDebian:13 |
before 6.8.12+dfsg1-0+deb13u1, plus listed versions 6.8.1+dfsg1-16.8.10+dfsg1-0+deb13u16.8.3+dfsg1-0+deb13u16.8.3+dfsg1-16.8.6+dfsg1-0+deb13u16.8.7+dfsg1-0+deb13u1 |
6.8.12+dfsg1-0+deb13u1 |
wordpressDebian:14 |
before 7.1.3+dfsg1-1, plus listed versions 6.8.1+dfsg1-16.8.3+dfsg1-16.9+dfsg1-16.9.4+dfsg1-17.0+dfsg1-1 Show 5 moreShow less7.0.2+dfsg1-17.0.3+dfsg1-17.1+dfsg1-17.1.1+dfsg1-17.1.2+dfsg1-1 |
7.1.3+dfsg1-1 |
wordpressUbuntu:16.04:LTS |
All versions, plus listed versions 4.3+dfsg-14.3.1+dfsg-14.4+dfsg-14.4.1+dfsg-14.4.2+dfsg-14.4.2+dfsg-1ubuntu1 |
None known |
wordpressUbuntu:18.04:LTS |
All versions, plus listed versions 4.8.2+dfsg-24.8.3+dfsg-14.9.1+dfsg-14.9.2+dfsg-14.9.4+dfsg-14.9.5+dfsg1-1 |
None known |
wordpressUbuntu:20.04:LTS |
All versions, plus listed versions 5.2.2+dfsg1-15.2.4+dfsg1-15.3.2+dfsg1-15.3.2+dfsg1-1ubuntu1 |
None known |
wordpressUbuntu:22.04:LTS |
All versions, plus listed versions 5.7.1+dfsg1-2ubuntu15.8.1+dfsg1-2ubuntu15.8.2+dfsg1-1ubuntu15.8.3+dfsg1-1ubuntu15.8.3+dfsg1-1ubuntu1.1 |
None known |
wordpressUbuntu:24.04:LTS |
All versions, plus listed versions 6.2+dfsg1-1ubuntu16.4.3+dfsg1-1ubuntu1 |
None known |
wordpressUbuntu:26.10 |
All versions, plus listed versions 6.7.2+dfsg1-1.1ubuntu2 |
None known |
wordpressUbuntu:26.04:LTS |
All versions, plus listed versions 6.7.2+dfsg1-1.1ubuntu16.7.2+dfsg1-1.1ubuntu2 |
None known |
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | CVE List, EUVD, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2026-66666 is a medium vulnerability (CVSS 6.9) in Automattic Wordpress, published October 6, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.40%, the 34th percentile. Fixed in wordpress 6.8.12+dfsg1-0+deb13u1.
References
patchstack.com/database/wordpress/wordpress/wordpress/vulnerability/wordpress-wordpress-wordpress-7-1-2-sensitive-data-exposure-vulnerability?_s_id=cve
wordpress.org/news/2026/10/wordpress-7-1-3-maintenance-and-security-release
nvd.nist.gov/vuln/detail/CVE-2026-66666
github.com/advisories/GHSA-vxpf-4h6r-qjx4
security-tracker.debian.org/tracker/CVE-2026-66666
ubuntu.com/security/CVE-2026-66666
cve.org/CVERecord?id=CVE-2026-66666