CVE-2022-31358 Cross-site scripting in n/a

Critical 9.0 Published 14 Dec 2022 Updated 9 Jul 2026

Remote attackers can execute arbitrary web scripts via reflected XSS in Proxmox Virtual Environment, potentially compromising user sessions.

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-2022-31358?

CVE-2022-31358 is a critical cross-site scripting vulnerability in n/a, published on 14 Dec 2022. 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 reflected cross-site scripting (XSS) vulnerability in Proxmox Virtual Environment prior to v7.2-3 allows remote attackers to execute arbitrary web scripts or HTML via non-existent endpoints under path /api2/html/.

Weakness: CWE-79

Which versions are affected by CVE-2022-31358?

It affects 1 product.

Products include Proxmox Virtual Environment.

How do I fix CVE-2022-31358?

No fix has been published for CVE-2022-31358 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-2022-31358 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2022-31358 exists.

Sources

Also known as GHSA-rxvq-gr74-jvpj.