CVE-2025-41357 Reflected Cross-Site Scripting on Anon Proxy Server

Medium 5.1 Published 31 Mar 2026 Updated 31 Mar 2026

Reflected XSS in Anon Proxy Server allows attackers to execute JavaScript via malicious URLs, potentially stealing session cookies or performing actions on behalf of users.

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-2025-41357?

CVE-2025-41357 is a medium-severity cross-site scripting vulnerability in Anon Proxy Server, published on 31 Mar 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

Reflected Cross-Site Scripting (XSS) vulnerability in Anon Proxy Server v0.104. This vulnerability allows an attacker to execute JavaScript code in the victim's browser by sending him/her a malicious URL. This vulnerability can be exploited to steal sensitive user data, such as session cookies, or to perform actions on behalf of the user. It affects 'host' parameter in '/diagdns.php' endpoint.

Weakness: CWE-79

Which versions are affected by CVE-2025-41357?

It affects 1 product.

Products include Anonproxyserver Anon Proxy Server.

How do I fix CVE-2025-41357?

No fix has been published for CVE-2025-41357 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-2025-41357 being exploited?

There is no known exploitation of CVE-2025-41357 in the wild and no public exploit code.

Sources

Also known as GHSA-3385-wm72-hh52.