CVE-2026-81807
Deferred Deferred - Pending Action

Simple Ajax Chat WordPress Plugin Reflected Cross-Site Scripting

Publication date: 2026-09-02

Last updated on: 2026-09-02

Assigner: WPScan

Description
The Simple Ajax Chat WordPress plugin before 20260827 does not escape chat message content before rendering it, allowing unauthenticated users to inject arbitrary HTML attributes into the page and run scripts in the browser of anyone viewing the chat, including administrators.

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Meta Information

Published
2026-09-02
Last Modified
2026-09-02
Generated
2026-09-13
AI Q&A
2026-09-02
EPSS Evaluated
2026-09-12
NVD
CVE-2026-81807
EUVD
EUVD-2026-69859

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
simple_ajax_chat 20260827 to 20260827 (exc)

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 stored cross-site scripting (XSS) vulnerability in the Simple Ajax Chat WordPress plugin. It allows unauthenticated users to inject arbitrary HTML attributes into chat messages, which are then rendered without proper escaping. This can cause malicious scripts to execute in the browsers of anyone viewing the chat, including administrators.

Detection Guidance

Check the installed version of the Simple Ajax Chat plugin. If it is below 20260827, the system is vulnerable. Inspect chat messages for unusual HTML attributes or scripts in the page source.

Impact Analysis

An attacker could exploit this to run malicious scripts in your browser when viewing the chat. This could lead to session hijacking, theft of cookies or sensitive data, or unauthorized actions performed on your behalf. Administrators are particularly at risk as their elevated privileges could be exploited.

Compliance Impact

This vulnerability could lead to unauthorized access to user data, violating GDPR's data protection requirements. For HIPAA, it may compromise protected health information if exposed through the chat. Both standards require safeguards against unauthorized data access or modification.

Mitigation Strategies

Update the Simple Ajax Chat plugin to version 20260827 or later immediately. If updating is not possible, consider disabling the plugin until a patch is applied.

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