CVE-2026-81807highCWE-79

CVE-2026-81807: high-severity vulnerability in Simple Ajax Chat

Simple Ajax Chat < 20260827 - Unauthenticated Stored XSS via Chat Message Linkification

Published

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41Vexday Risk Score

No sign of exploitation. It has a public proof of concept.

ssvc Attendcvss 8.8epss 0.5%
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:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Affected products
Unknown · Simple Ajax Chat
⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.
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CVE-2024-1983HIGHSimple Ajax Chat < 20240223 - Unauthenticated Stored XSSEPSS 0.5%CVE-2024-2470MEDIUMSimple Ajax Chat < 20240412 - Admin+ Stored XSSEPSS 0.3%