CVE-2026-66636
Received Received - Intake

Contributor XSS in Wise Chat <= 3.4

Publication date: 2026-08-18

Last updated on: 2026-08-18

Assigner: Patchstack

Description
Contributor Cross Site Scripting (XSS) in Wise Chat <= 3.4 versions.

CVSS Scores

EPSS Scores

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Meta Information

Published
2026-08-18
Last Modified
2026-08-18
Generated
2026-08-18
AI Q&A
2026-08-18
EPSS Evaluated
N/A
NVD
CVE-2026-66636
EUVD
EUVD-2026-60921

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
wise_chat wise_chat to 3.4 (inc)

Helpful Resources

Exploitability

CWE
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KEV
KEV Icon
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.

Attack-Flow Graph

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Executive Summary

This is a Contributor Cross Site Scripting (XSS) vulnerability found in Wise Chat plugin versions up to and including 3.4. XSS allows attackers to inject malicious scripts into web pages viewed by other users. The vulnerability has a CVSS base score of 6.5, indicating moderate severity.

Impact Analysis

An attacker could exploit this to steal user sessions, deface websites, or perform actions on behalf of users. Since it requires user interaction (UI:R in CVSS vector), it is less likely to be exploited automatically but still poses a risk to users of affected versions.

Compliance Impact

XSS vulnerabilities can lead to unauthorized data access or modification, which may violate GDPR (data protection) or HIPAA (health data privacy) requirements. Organizations using vulnerable software could face compliance violations if exploited.

Mitigation Strategies

Immediately update Wise Chat to the latest version beyond 3.4 to patch the XSS vulnerability. If updating is not possible, consider disabling the plugin or restricting user input fields to prevent malicious scripts.

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