CVE-2025-26391 SolarWinds Observability Self-Hosted XSS Vulnerability

Medium 5.4 Published 18 Nov 2025 Updated 18 Nov 2025

Authenticated attackers can inject malicious scripts into user-created URL fields in SolarWinds Observability Self-Hosted, potentially compromising other users.

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Local or same network only
Victim action needed: Not needed
Fix: None listed

What is CVE-2025-26391?

CVE-2025-26391 is a medium-severity cross-site scripting vulnerability in SolarWinds Observability Self-Hosted, published on 18 Nov 2025. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

SolarWinds Observability Self-Hosted XSS Vulnerability. The SolarWinds Platform was susceptible to a XSS vulnerability that affects user-created URL fields. This vulnerability requires authentication from a low-level account.

Weakness: CWE-79

Which versions are affected by CVE-2025-26391?

It affects 1 product.

Products include Solarwinds Observability Self-Hosted.

How do I fix CVE-2025-26391?

No fix has been published for CVE-2025-26391 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-2025-26391 being exploited?

There is no known exploitation of CVE-2025-26391 in the wild and no public exploit code.

Sources

Also known as GHSA-rmmr-w34p-g372.