CVE-2026-128893
Deferred Deferred - Pending Action

Reflected Cross-Site Scripting in Wise Chat Plugin

Publication date: 2026-11-15

Last updated on: 2026-11-15

Assigner: Patchstack

Description
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Marcin Wise Chat wise-chat allows Reflected XSS.This issue affects Wise Chat: from n/a through 3.4.5.

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Meta Information

Published
2026-11-15
Last Modified
2026-11-15
Generated
2026-11-15
AI Q&A
2026-11-15
EPSS Evaluated
N/A
NVD
CVE-2026-128893
EUVD
EUVD-2026-126086

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
wise_chat wise_chat to 3.4.5 (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 a reflected Cross-site Scripting (XSS) vulnerability in the Wise Chat plugin for WordPress. It occurs when user input is not properly neutralized during web page generation, allowing attackers to inject malicious scripts that execute in the context of a victim's browser.

Detection Guidance

To detect this reflected XSS vulnerability in Wise Chat, inspect web traffic for malicious scripts in parameters. Use tools like Burp Suite or OWASP ZAP to intercept and analyze requests. Check for unusual input in URL parameters or form fields that reflect back unsanitized data.

Impact Analysis

An attacker could trick you into clicking a malicious link, which would execute arbitrary JavaScript in your browser. This could lead to theft of session cookies, account takeover, or defacement of the website. The impact includes confidentiality, integrity, and availability risks.

Compliance Impact

This vulnerability could lead to unauthorized access to user data, violating GDPR's data protection principles and HIPAA's security requirements. It may result in data breaches, triggering mandatory breach notifications and potential fines under these regulations.

Mitigation Strategies

Immediately update Wise Chat to the latest version (3.4.5 or later). If updating is not possible, disable the plugin temporarily. Implement input validation and output encoding for all user-supplied data. Use a web application firewall to block XSS payloads.

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