CVE-2025-48360 WordPress Varnish/Nginx Proxy Caching plugin <= 1.8.3 - Cross Site Scripting (XSS) vulnerability
An attacker can inject malicious scripts into the Varnish/Nginx Proxy Caching plugin, potentially compromising user sessions or site integrity.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2025-48360?
CVE-2025-48360 is a medium-severity cross-site scripting vulnerability in Razvan Stanga Varnish/Nginx Proxy Caching, published on 28 Aug 2025. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.
Official description
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Razvan Stanga Varnish/Nginx Proxy Caching vcaching allows Stored XSS.This issue affects Varnish/Nginx Proxy Caching: from n/a through <= 1.8.3.
Weakness: CWE-79
Which versions are affected by CVE-2025-48360?
How do I fix CVE-2025-48360?
No fix has been published for CVE-2025-48360 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-2025-48360 being exploited?
There is no known exploitation of CVE-2025-48360 in the wild and no public exploit code.
Sources
Also known as GHSA-fmm6-3494-qm57.