CVE-2026-71249 - 299Ko: Unauthenticated Reflected XSS in Public Contact Form
CVE ID :CVE-2026-71249
Published : Aug. 5, 2026, 11:16 a.m. | 1 hour, 39 minutes ago
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="> 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.
Severity: 6.1 | MEDIUM
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Published : Aug. 5, 2026, 11:16 a.m. | 1 hour, 39 minutes ago
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="> 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.
Severity: 6.1 | MEDIUM
Visit the link for more details, such as CVSS details, affected products, timeline, and more...