CVE-2026-81825highCWE-79

CVE-2026-81825: high-severity vulnerability in specialk Simple Ajax Chat – Add a Fast, Secure…

Simple Ajax Chat <= 20260811 - Unauthenticated Stored Cross-Site Scripting

Published

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21Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackcvss 7.2epss 0.5%
The Simple Ajax Chat – Add a Fast, Secure Chat Box plugin for WordPress is vulnerable to Stored Cross-Site Scripting via Chat Message in all versions up to, and including, <= 20260811 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. The nonce protecting chat message submission is publicly visible on the chat page, rendering it ineffective as an authentication barrier and allowing fully unauthenticated attackers to submit malicious messages that are stored persistently and rendered to all visitors on every page load.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
Affected products
specialk · Simple Ajax Chat – Add a Fast, Secure Chat Box
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In the same product, most dangerous first.

CVE-2024-2956MEDIUMSimple Ajax Chat <= 20231101 - Authenticated (Admin+) Stored Cross-Site ScriptingEPSS 0.3%CVE-2026-2987MEDIUMSimple Ajax Chat <= 20260217 - Unauthenticated Stored Cross-Site Scripting via 'c'EPSS 0.2%