What is CVE-2025-26391?

CVE-2025-26391 is a medium-severity vulnerability in Solarwinds Observability Self-hosted, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2025-11-18.

How severe is CVE-2025-26391?

Medium severity. CVSS v3 base score is 5.4 out of 10.

XSS in Solarwinds Observability Self-hosted

CVE-2025-26391

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.

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.000 (4.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N.

Affected products

Solarwinds Observability Self-hosted — versions SolarWinds Observability Self-Hosted 2025.4 and prior versions

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

Frequently asked questions

What is CVE-2025-26391?: CVE-2025-26391 is a medium-severity vulnerability in Solarwinds Observability Self-hosted, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2025-11-18.
How severe is CVE-2025-26391?: Medium severity. CVSS v3 base score is 5.4 out of 10.