CVE-2026-71249CWE-79cross-site-scripting

CVE-2026-71249

Medium · published August 5, 2026

CVSS v3.1

6.1

EPSS

Percentile

15.9

In the wild

Unconfirmed

What it is

299Ko's public contact form (plugin/contact/controllers/ContactController.php, home) sets raw POST field values (name, firstname, email, message) into the page template with no sanitization. The template engine's variable output function (common/Template.php, _show_var) echoes values with no htmlspecialchars call, and the sink template (contact.tpl) outputs these values unescaped into an HTML attribute and a textarea.

The record

Technical detail

CVSS v3.1: 6.1 · MEDIUM
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
CVSS v4.0: Not supplied
EPSS: 0.00253 · 15.9th percentile
Weakness: CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Published: 2026-08-05T15:16Z

References (1)

https://github.com/search?q=299ko&type=repositories · 309f9ea4-e3e9-4c6c-b79d-e8eb01244f2c

EPSS history

Timeline

05 AUG 10:57Z
299Ko - Unauthenticated Reflected XSS in Public Contact Form
cvelistv5