CVE-2026-81807 Simple Ajax Chat < 20260827 - Unauthenticated Stored XSS via Chat Message Linkification
Unauthenticated attackers can inject malicious scripts into chat messages, potentially compromising administrator accounts viewing the chat.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-81807?
CVE-2026-81807 is a high-severity cross-site scripting vulnerability in Unknown Simple Ajax Chat, published on 2 Sep 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official 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.
Weakness: CWE-79
Which versions are affected by CVE-2026-81807?
How do I fix CVE-2026-81807?
No fix has been published for CVE-2026-81807 yet. Limit exposure of the affected software until one is available.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2026-81807 being exploited?
There is no known exploitation of CVE-2026-81807 in the wild and no public exploit code.
Sources
Also known as GHSA-xx7f-q66c-932r.