CVE-2025-57540 Cross-site scripting in n/a
Authenticated users can inject JavaScript into the WebAuthn Relying Party field, leading to client-side attacks against other users viewing the configuration.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2025-57540?
CVE-2025-57540 is a medium-severity cross-site scripting vulnerability in n/a, published on 9 Sep 2025. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official description
A stored cross-site scripting (XSS) vulnerability exists in the WebAuthn Relying Party field within the Datacenter configuration of Proxmox Virtual Environment (PVE) 8.4. Authenticated users can inject JavaScript code that is later executed in the browsers of users who view the configuration page, enabling client-side attacks.
Weakness: CWE-79
Which versions are affected by CVE-2025-57540?
It affects 1 product.
Products include Proxmox Virtual Environment.
How do I fix CVE-2025-57540?
No fix has been published for CVE-2025-57540 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-2025-57540 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-57540 exists.
Other vulnerabilities in n/a
Sources
Also known as GHSA-2p4j-7hmq-hf5r.