CVE-2025-56154 Cross-site scripting in n/a

Medium 6.1 Published 2 Oct 2025 Updated 20 Jan 2026

Attackers can inject arbitrary JavaScript via the name parameter in the author endpoint, potentially executing code in victim browsers.

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-2025-56154?

CVE-2025-56154 is a medium-severity cross-site scripting vulnerability in n/a, published on 2 Oct 2025. 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

htmly v3.0.8 is vulnerable to Cross Site Scripting (XSS) in the /author/:name endpoint of the affected application. The name parameter is not properly sanitized before being reflected in the HTML response, allowing attackers to inject arbitrary JavaScript payloads.

Weakness: CWE-79

Which versions are affected by CVE-2025-56154?

It affects 1 product.

Products include Htmly Htmly.

How do I fix CVE-2025-56154?

No fix has been published for CVE-2025-56154 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-2025-56154 being exploited?

There is no known exploitation of CVE-2025-56154 in the wild and no public exploit code.

Sources

Also known as GHSA-4xvq-93jj-7c4r.