Vulnerability · Published Aug 5, 2026 · Assigned by TuranSec

CVE-2026-71249299Ko - Unauthenticated Reflected XSS in Public Contact Form

Medium 6.1

In plain English

A medium-severity cross-site scripting in 299Ko from 299ko. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 17% of all known vulnerabilities).

Severity (CVSS 3.1)6.1Medium

Exploit odds (30 days)0.3%top 83.1% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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.

Affected products (as reported)

Vendor	Product	Versions
299ko	299Ko	0

Weakness: CWE-79 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

References

https://github.com/search?q=299ko&type=repositories third-party-advisory