CVE-2026-81807: Unknown Simple AJAX Chat

High severity, CVSS 8.8. EPSS: 0.5% chance of exploitation in the next 30 days.

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.

Affected products

• Unknown Simple AJAX Chat: before 20260827 (fixed in 20260827)

Published 2026-09-02. Last modified 2026-09-03.