CVE-2026-66598
Deferred Deferred - Pending Action

Unauthenticated XSS in B2BKing Premium

Publication date: 2026-08-20

Last updated on: 2026-08-20

Assigner: Patchstack

Description
Unauthenticated Cross Site Scripting (XSS) in B2BKing Premium <= 5.6.07 versions.

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Meta Information

Published
2026-08-20
Last Modified
2026-08-20
Generated
2026-08-20
AI Q&A
2026-08-20
EPSS Evaluated
N/A
NVD
CVE-2026-66598
EUVD
EUVD-2026-63340

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
b2bking premium to 5.6.07 (inc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-79 The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.

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Executive Summary

This is an Unauthenticated Cross Site Scripting (XSS) vulnerability in the B2BKing Premium WordPress plugin versions 5.6.07 and earlier. It allows attackers to inject malicious scripts into websites, potentially causing redirects or unwanted content display when visitors access the site.

Detection Guidance

To detect this XSS vulnerability in B2BKing Premium <= 5.6.07, check if your WordPress site is running an affected version. Inspect network traffic for suspicious scripts or payloads in user inputs. Use security tools like Wordfence or Patchstack to scan for known XSS patterns. No specific commands are provided in the resources.

Impact Analysis

Attackers could exploit this to execute malicious scripts in users' browsers, leading to actions like stealing session cookies, redirecting users to phishing sites, or displaying harmful content. Users with privileged access must interact with a crafted link for exploitation.

Compliance Impact

XSS vulnerabilities can lead to unauthorized data access or manipulation, violating GDPR (data protection) and HIPAA (health data privacy) by exposing sensitive user information. Compliance may require immediate patching and incident reporting.

Mitigation Strategies

Immediately update B2BKing Premium to version 5.6.08 or later. Apply Patchstack's provided mitigation rule to block attacks until the update is complete. Remove or restrict access for untrusted users who could trigger the XSS via crafted links or forms.

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