CVE-2025-71166 Typesetter CMS Reflected XSS via Move Message Handling

Medium 4.8 Published 14 Jan 2026 Updated 14 Jul 2026

An authenticated attacker can execute arbitrary scripts in an admin's browser via reflected XSS in the Tools Status move message handling.

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Over the internet
Victim action needed: A user has to click or open something
Fix: None listed

What is CVE-2025-71166?

CVE-2025-71166 is a medium-severity cross-site scripting vulnerability in Typesetter, published on 14 Jan 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.

Official description

Typesetter CMS versions up to and including 5.1 contain a reflected cross-site scripting (XSS) vulnerability in the administrative interface within the Tools Status move message handling. The path parameter is reflected into the HTML output without proper output encoding in include/admin/Tools/Status.php. An authenticated attacker can supply crafted input containing HTML or JavaScript, resulting in arbitrary script execution in the context of an authenticated user's browser session.

Weakness: CWE-79

Which versions are affected by CVE-2025-71166?

It affects 1 product.

Products include Typesettercms Typesetter.

How do I fix CVE-2025-71166?

No fix has been published for CVE-2025-71166 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-2025-71166 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-71166 exists.

Sources

Also known as GHSA-8mjw-9xwx-f4c5.