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CVE-2026-110017— Quick PayPal Payments: Payment Button & Form <= 6.0.4 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'form' Shortcode Attribute

Quick assessment

Affected
fullworks Quick PayPal Payments: Payment Button & Form
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"Quick PayPal Payments: Payment Button & Form"在 6.0.4 及之前所有版本中，由于输入清理和输出转义不足，存在通过"form"参数触发的存储型跨站脚本（Stored XSS）漏洞。该漏洞允许拥有贡献者（Contributor）及以上权限的已认证攻击者，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。由于 函数仅过滤 HTML 标签，因此不包含尖括号但能破坏引号的攻击载荷在保存后仍能完整保留，导致注入的脚本对所有查看该

CVSS 6.4 · Medium EPSS 0.20% · P9

Affected Version Matrix 1

VendorProduct Version RangeStatus
fullworks Quick PayPal Payments: Payment Button & Form ≤ 6.0.4 affected
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I. Basic Information for CVE-2026-110017

Vulnerability Information
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Vulnerability Title
Quick PayPal Payments: Payment Button & Form <= 6.0.4 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'form' Shortcode Attribute
Source: CVE Program / CVE List V5
Vulnerability Description
The Quick PayPal Payments: Payment Button & Form plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'form' parameter in all versions up to, and including, 6.0.4 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. Because wp_kses_post strips only HTML tags, a quote-breaking payload containing no angle brackets survives post save intact, and the injected script fires for every viewer of the post — including higher-privileged Editors and Administrators who routinely preview a Contributor's pending content.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/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
fullworks Quick PayPal Payments: Payment Button & Form 0 ~ 6.0.4 -

II. Public POCs for CVE-2026-110017

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III. Intelligence Information for CVE-2026-110017

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Patches & Fixes for CVE-2026-110017 (2)

Vendor Advisories for CVE-2026-110017 (1)

IV. Related Vulnerabilities

Same vendor: fullworks
Same weakness: CWE-79

V. Comments for CVE-2026-110017

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