CVE-2025-41355 Reflected Cross-Site Scripting on Anon Proxy Server
Attackers can execute JavaScript in victims' browsers 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-2025-41355?
CVE-2025-41355 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 'port' and 'proxyPort' parameters in '/anon.php' endpoint.
Weakness: CWE-79
Which versions are affected by CVE-2025-41355?
It affects 1 product.
Products include Anonproxyserver Anon Proxy Server.
How do I fix CVE-2025-41355?
No fix has been published for CVE-2025-41355 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-2025-41355 being exploited?
There is no known exploitation of CVE-2025-41355 in the wild and no public exploit code.
Other vulnerabilities in Anon Proxy Server
Sources
Also known as GHSA-hvcr-3gq9-w43p.