CVE-2026-57857: Flow Payment, XSS

Описание

Оригинално описание

The Flow Payment plugin for WordPress (flow.cl) version 3.0.8 is vulnerable to reflected cross-site scripting on the WooCommerce checkout page. When the plugin handles an order cancellation, the error_message GET parameter is passed directly to wc_add_notice() in flowpayment-fl.php (lines 57-58) without input sanitization (for example sanitize_text_field()) or output escaping (for example esc_html()) before being rendered in the checkout notice HTML. An unauthenticated attacker can craft a URL containing a JavaScript payload in the error_message parameter (for example /checkout/?add-to-cart={product-id}&cancel_order=true&error_message={payload}); when a victim with an active WooCommerce checkout session follows the link, the payload executes in the victim's browser in the origin of the WordPress site.

Засегнати продукти

• Flow Flow Payment: до 3.0.8; 3.0.9

Вид слабост

• CWE-79 XSS

История

Първоизточници

• https://www.cve.org/CVERecord?id=CVE-2026-57857
• https://nvd.nist.gov/vuln/detail/CVE-2026-57857
• https://www.flow.cl/
• https://www.vulncheck.com/advisories/flow-payment-plugin-for-wordpress-reflected-cross-site-scripting-via-error-message-parameter