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CVE-2026-111110— Payment forms, Buy now buttons, and Invoicing System | GetPaid <= 2.8.61 - Unauthenticated Stored Cross-Site Scripting via 'mmdwqzpoxadd' Parameter

Quick assessment

Affected
stiofansisland Payment forms, Buy now buttons, and Invoicing System | GetPaid
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 插件"GetPaid"（包含支付表单、“立即购买”按钮及发票系统）在所有 2.8.61 及更早版本中，由于输入清理和输出转义不足，其 参数存在存储型跨站脚本（Stored XSS）漏洞。这使得未认证的攻击者能够在页面中注入任意 Web 脚本，当用户访问被注入的页面时，这些脚本将被执行。 该漏洞利用所需的验证令牌（nonce，即 ）已通过 以 的形式公开暴露给所有访客，因此攻击者无需任何身份验证或预先获取 nonce 即可发起攻击。注入的恶意载荷将在管理员查看受影响发票的“支付表单详情”元框（me

CVSS 7.2 · High

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2026-111110

Vulnerability Information
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Vulnerability Title
Payment forms, Buy now buttons, and Invoicing System | GetPaid <= 2.8.61 - Unauthenticated Stored Cross-Site Scripting via 'mmdwqzpoxadd' Parameter
Source: CVE Program / CVE List V5
Vulnerability Description
The Payment forms, Buy now buttons, and Invoicing System | GetPaid plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'mmdwqzpoxadd' parameter in all versions up to, and including, 2.8.61 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 required nonce (getpaid_form_nonce) is publicly emitted to all visitors via wp_localize_script as WPInv.formNonce, meaning no authentication or prior nonce leak is needed; the stored payload fires when an administrator views the affected invoice's Payment Form Details metabox.
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
stiofansisland Payment forms, Buy now buttons, and Invoicing System | GetPaid 0 ~ 2.8.61 -

II. Public POCs for CVE-2026-111110

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III. Intelligence Information for CVE-2026-111110

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Patches & Fixes for CVE-2026-111110 (1)

Vendor Pages for CVE-2026-111110 (2)

Other References for CVE-2026-111110 (1)

Other References for CVE-2026-111110 (1)

IV. Related Vulnerabilities

Same product: Payment forms, Buy now buttons, and Invoicing System | GetPaid
Same vendor: stiofansisland
Same weakness: CWE-79

V. Comments for CVE-2026-111110

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