🔐 CVE Alert

CVE-2026-66596

HIGH 7.1

WordPress Newsletter plugin <= 9.3.3 - Cross Site Scripting (XSS) vulnerability

CVSS Score
7.1
EPSS Score
0.0%
EPSS Percentile
0th

Unauthenticated Cross Site Scripting (XSS) in Newsletter <= 9.3.3 versions.

CWE CWE-79
Vendor stefano lissa
Product newsletter
Published Aug 19, 2026
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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Changed
Confidentiality
Low
Integrity
Low
Availability
Low

Affected Versions

Stefano Lissa / Newsletter
n/a ≤ 9.3.3

References

NVD ↗ CVE.org ↗ EPSS Data ↗
patchstack.com: https://patchstack.com/database/wordpress/plugin/newsletter/vulnerability/wordpress-newsletter-plugin-9-3-3-cross-site-scripting-xss-vulnerability?_s_id=cve

Credits

daroo | Patchstack Bug Bounty Program