CVE-2026-56785CWE-79

FlatPress - Stored Cross-Site Scripting via Unescaped Comment and Contact Form Fields

High · published June 23, 2026

CVSS v4.0
8.4
EPSS
0%
Percentile
35.3
In the wild
Unconfirmed
What it is

FlatPress contains a stored cross-site scripting vulnerability in comment and contact forms where name, URL, and email fields are rendered without proper output encoding in Smarty templates. Attackers can inject arbitrary HTML and JavaScript through these fields to execute malicious scripts in browsers of viewers including administrators, or bypass URL scheme validation to inject javascript: or data: URIs.

The record
Technical detail
CVSS v4.0
8.4 · HIGH
Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:L/VA:N/SC:H/SI:L/SA:N
EPSS
0.00421 · 35.3th percentile
Weakness
CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Published
2026-06-23T22:09Z
EPSS history
Timeline
  • 23 JUN 22:09Z
    FlatPress - Stored Cross-Site Scripting via Unescaped Comment and Contact Form Fields
    cvelistv5