CVE-2025-11146 Reflected Cross-site scripting (XSS) vulnerability in Apt-Cacher-NG

Medium 5.1 Published 29 Sep 2025 Updated 29 Sep 2025

An attacker can execute malicious scripts in the web management application via reflected XSS in the report page.

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: Available

What is CVE-2025-11146?

CVE-2025-11146 is a medium-severity cross-site scripting vulnerability in Apt-Cacher-NG, published on 29 Sep 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

Reflected Cross-site scripting (XSS) in Apt-Cacher-NG v3.2.1. The vulnerability allows an attacker to execute malicious scripts (XSS) in the web management application. The vulnerability is caused by improper handling of GET inputs included in the URL in “/acng-report.html”.

Weakness: CWE-79

Which versions are affected by CVE-2025-11146?

It affects 1 product.

Products include Apt-Cacher-Ng Project Apt-Cacher-Ng.

How do I fix CVE-2025-11146?

Upgrade to a fixed version.

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-2025-11146 being exploited?

There is no known exploitation of CVE-2025-11146 in the wild and no public exploit code.

Sources

Also known as DEBIAN-CVE-2025-11146, GHSA-4g63-h282-h922, UBUNTU-CVE-2025-11146.