CVE-2026-120597: Welcart e-Commerce Plugin paymentESCOTT.main.class.php error_page_message cross site scripting

A vulnerability was identified in Welcart e-Commerce Plugin up to 2.12.6 on WordPress. This affects the function ESCOTTMAIN::errorpagemessage of the file classes/paymentESCOTT.main.class.php. Such manipulation of the argument ResponseCd leads to cross site scripting. The attack can be launched remotely. The exploit is publicly available and might be used. Upgrading to version 2.12.7 mitigates this issue. It is recommended to upgrade the affected component. The value is now escaped with eschtml() before output. The vendor was contacted early, responded in a very professional manner and quickly released a fixed version of the affected product.