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CVE-2026-66598— WordPress B2BKing Premium plugin <= 5.6.07 - Cross Site Scripting (XSS) vulnerability

Quick assessment

Affected
Kingtech LLC. B2BKing Premium
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.

Kingtech B2BKing Premium是Kingtech公司的一款B2B电子商务批发电商组件。 Kingtech B2BKing Premium 5.6.07及之前版本存在跨站脚本漏洞，该漏洞源于对用户输入的验证和清理不充分，可能导致未经身份验证的攻击者实施跨站脚本攻击。

CVSS 7.1 · High EPSS 0.25% · P16

Possible ATT&CK Techniques 1 AI

T1059.007 · JavaScript

Affected Version Matrix 1

VendorProduct Version RangeStatus
Kingtech LLC. B2BKing Premium n/a≤ 5.6.07 affected
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I. Basic Information for CVE-2026-66598

Vulnerability Information
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Vulnerability Title
WordPress B2BKing Premium plugin <= 5.6.07 - Cross Site Scripting (XSS) vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
Unauthenticated Cross Site Scripting (XSS) in B2BKing Premium <= 5.6.07 versions.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L
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
Vulnerability Title
Kingtech B2BKing Premium 跨站脚本漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Kingtech B2BKing Premium是Kingtech公司的一款B2B电子商务批发电商组件。 Kingtech B2BKing Premium 5.6.07及之前版本存在跨站脚本漏洞，该漏洞源于对用户输入的验证和清理不充分，可能导致未经身份验证的攻击者实施跨站脚本攻击。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Kingtech LLC. B2BKing Premium n/a ~ 5.6.07 -

II. Public POCs for CVE-2026-66598

# POC Description Source Link Shenlong Link
AI-Generated POC Premium

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III. Intelligence Information for CVE-2026-66598

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Vendor Advisories for CVE-2026-66598 (1)

IV. Related Vulnerabilities

Same product: B2BKing Premium
Same weakness: CWE-79

V. Comments for CVE-2026-66598

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