CVE-2026-19914— Welcart e-Commerce <= 2.12.1 - Unauthenticated Stored Cross-Site Scripting via 'custom_order' Parameter
Quick assessment
Affected
uscnanbu Welcart e-Commerce
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
WordPress 的 Welcart 电子商务插件存在存储型跨站脚本（Stored Cross-Site Scripting, XSS）漏洞，影响所有版本直至并包括 2.12.1。该漏洞源于输入验证不足以及输出转义缺失。 这使得未经身份验证的攻击者能够注入任意 Web 脚本。这些脚本将在用户访问被注入的页面时执行。注入的载荷通过访客结账表单传递（无需身份验证），并在管理员在 WordPress 后台面板中查看受影响的订单时执行。
Possible ATT&CK Techniques 1 AI
T1189 · Drive-by Compromise
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I. Basic Information for CVE-2026-19914
Vulnerability Information
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Vulnerability Title
Welcart e-Commerce <= 2.12.1 - Unauthenticated Stored Cross-Site Scripting via 'custom_order' Parameter
Source: CVE Program / CVE List V5
Vulnerability Description
The Welcart e-Commerce plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'custom_order' parameter in all versions up to, and including, 2.12.1 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. The injected payload is delivered via the guest checkout form, requiring no authentication, and executes when an administrator views the affected order in the WordPress admin panel.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: CVE Program / CVE List V5
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| uscnanbu | Welcart e-Commerce | 0 ~ 2.12.1 | - |
|
II. Public POCs for CVE-2026-19914
| # | POC Description | Source Link | Shenlong Link |
|---|
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Other References for CVE-2026-19914 (8)
IV. Related Vulnerabilities
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Same weakness: CWE-79
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V. Comments for CVE-2026-19914
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