CVE-2026-66596CWE-79cross-site-scripting

CVE-2026-66596

High · published August 19, 2026

CVSS v3.1
7.1
EPSS
0%
Percentile
15.6
In the wild
Unconfirmed
What it is

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

The record
Technical detail
CVSS v3.1
7.1 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L
CVSS v4.0
Not supplied
EPSS
0.00251 · 15.6th percentile
Weakness
CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Published
2026-08-19T17:17Z
References (1)
https://patchstack.com/database/wordpress/plugin/newsletter/vulnerability/wordpress-newsletter-plugin-9-3-3-cross-site-scripting-xss-vulnerability?_s_id=cve · [email protected]
EPSS history
Timeline
  • 19 AUG 12:38Z
    WordPress Newsletter plugin <= 9.3.3 - Cross Site Scripting (XSS) vulnerability
    cvelistv5