CVE-2026-81807: CWE-79 Cross-Site Scripting (XSS) in Simple Ajax Chat
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.
CVSS v3.1
Score 8.8high
Affected software
Simple Ajax Chat
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-81807 is a CWE-79 Cross-Site Scripting vulnerability in the Simple Ajax Chat WordPress plugin. The flaw arises because the plugin fails to escape chat message content before rendering it on the page. This allows unauthenticated attackers to inject arbitrary HTML attributes and JavaScript code, which executes in the context of any user viewing the chat messages. The vulnerability affects versions prior to 20260827. No official patch or remediation level has been confirmed in the provided data.
Potential Impact
Successful exploitation allows unauthenticated attackers to execute arbitrary scripts in the browsers of users viewing the chat, potentially leading to theft of session cookies, defacement, or other malicious actions with the privileges of the victim user, including administrators. The CVSS score of 8.8 indicates a high severity impact on confidentiality, integrity, and availability.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, consider disabling the plugin or restricting access to the chat feature to trusted users only to reduce exposure.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- WPScan
- Date Reserved
- 2026-08-27T12:27:55.970Z
- State
- PUBLISHED
Threat ID: 6a97bd37acd9273b49d9bc5a
Added to database: 09/02/2026, 06:07:51 UTC
Last enriched: 09/07/2026, 14:08:12 UTC
Last updated: 10/17/2026, 06:48:20 UTC
Views: 87
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