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.
Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

Mon, 10 Aug 2026 12:00:00 +0000

Type Values Removed Values Added
Description 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. An unauthenticated attacker can submit a payload such as name="><script>alert(document.domain)</script> to achieve reflected XSS against any visitor who submits or is tricked into auto-submitting the form, including a targeted administrator, enabling session token theft. 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.

Mon, 10 Aug 2026 11:30:00 +0000

Type Values Removed Values Added
Title 299Ko: Unauthenticated Reflected XSS in Public Contact Form 299Ko - Unauthenticated Reflected XSS in Public Contact Form

Fri, 07 Aug 2026 11:45:00 +0000

Type Values Removed Values Added
First Time appeared 299ko
299ko 299ko
Vendors & Products 299ko
299ko 299ko

Wed, 05 Aug 2026 14:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Wed, 05 Aug 2026 11:15:00 +0000

Type Values Removed Values Added
Description 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. An unauthenticated attacker can submit a payload such as name="><script>alert(document.domain)</script> to achieve reflected XSS against any visitor who submits or is tricked into auto-submitting the form, including a targeted administrator, enabling session token theft.
Title 299Ko: Unauthenticated Reflected XSS in Public Contact Form
Weaknesses CWE-79
References
Metrics cvssV3_1

{'score': 6.1, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N'}


Projects

Sign in to view the affected projects.

cve-icon MITRE

Status: PUBLISHED

Assigner: TuranSec

Published:

Updated: 2026-08-10T11:46:05.754Z

Reserved: 2026-08-05T10:53:53.177Z

Link: CVE-2026-71249

cve-icon Vulnrichment

Updated: 2026-08-05T13:37:40.752Z

cve-icon NVD

Status : Received

Published: 2026-08-05T11:16:27.987

Modified: 2026-08-10T12:17:27.520

Link: CVE-2026-71249

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-08-10T21:15:07Z

Weaknesses