How severe is CVE-2025-26391?

CVE-2025-26391 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over an adjacent network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2025-26391 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (31st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-26391?

CVE-2025-26391 affects Solarwinds Observability Self-hosted. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-26391?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2025-26391 have an EU (EUVD) identifier?

Yes. CVE-2025-26391 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-197927.

When was CVE-2025-26391 published?

CVE-2025-26391 was published on 2025-11-18 and last updated on 2026-06-17.

CVE-2025-26391

CVE-2025-26391 is a medium-severity vulnerability in Solarwinds Observability Self-hosted with a CVSS 3.x base score of 5.4. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-79.

Key facts

Severity: Medium (CVSS 3.x base score 5.4)
EPSS exploit prediction: 0% (31st percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-197927
Weakness: CWE-79
Affected product: Solarwinds Observability Self-hosted
Published: 2025-11-18
Last modified: 2026-06-17

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.

Frequently asked questions

What is 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.
How severe is CVE-2025-26391?: CVE-2025-26391 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over an adjacent network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2025-26391 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (31st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-26391?: CVE-2025-26391 affects Solarwinds Observability Self-hosted. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-26391?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-26391 have an EU (EUVD) identifier?: Yes. CVE-2025-26391 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-197927.
When was CVE-2025-26391 published?: CVE-2025-26391 was published on 2025-11-18 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:solarwinds:observability_self-hosted:*:*:*:*:*:*:*:*

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