---
id: CVE-2026-66636
title: >-
  Improper Neutralization of Input During Web Page Generation ('Cross-site
  Scripting') vulnerability in Marcin Wise Chat wise-chat allows Stored XSS.This
  issue affects Wise Chat: from n/a through 3.4.2.
summary: >-
  Improper Neutralization of Input During Web Page Generation ('Cross-site
  Scripting') vulnerability in Marcin Wise Chat wise-chat allows Stored XSS.This
  issue affects Wise Chat: from n/a through 3.4.2.
severity: medium
cvss: 6.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:L'
cwe:
  - CWE-79
vendor: Marcin
product: wise-chat
affected:
  - wise-chat <= 3.4.2
published: '2026-08-18'
updated: '2026-10-06'
sourceUpdated: '2026-10-06T10:16:50.193'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-66636'
references:
  - url: >-
      https://patchstack.com/database/wordpress/plugin/wise-chat/vulnerability/wordpress-wise-chat-plugin-3-4-cross-site-scripting-xss-vulnerability?_s_id=cve
    label: audit@patchstack.com
tags:
  - nvd
  - cve.org
epss: 0.00224
epssPercentile: 0.11918
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-08-18T14:59:52.676965Z'
ingestedAt: '2026-10-06T09:53:02.845Z'
---

## Overview

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Marcin Wise Chat wise-chat allows Stored XSS.This issue affects Wise Chat: from n/a through 3.4.2.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.