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

Severity: medium (CVSS 5.4 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2025-11-18 · updated 2026-10-18
Weakness: CWE-79

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.

Affected products

SolarWinds Observability Self-Hosted: before 2025.4.1 — fixed in 2025.4.1

How to fix

Upgrade to a fixed version: SolarWinds Observability Self-Hosted 2025.4.1. Check the vendor advisory for mitigations.

References

https://documentation.solarwinds.com/en/success_center/orionplatform/content/release_notes/hco_2025-4-1_release_notes.htm
https://www.solarwinds.com/trust-center/security-advisories/CVE-2025-26391

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