How severe is CVE-2025-56534?

CVE-2025-56534 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2025-56534 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (8th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-56534?

CVE-2025-56534 affects Opennebula. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-56534?

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

Does CVE-2025-56534 have an EU (EUVD) identifier?

Yes. CVE-2025-56534 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-209587.

When was CVE-2025-56534 published?

CVE-2025-56534 was published on 2026-04-29 and last updated on 2026-06-17.

CVE-2025-56534

CVE-2025-56534 is a medium-severity vulnerability in Opennebula with a CVSS 3.x base score of 6.1. 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 6.1)
EPSS exploit prediction: 0% (8th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-209587
Weakness: CWE-79
Affected product: Opennebula
Published: 2026-04-29
Last modified: 2026-06-17

Description

A cross-site scripting (XSS) vulnerability in the custom authenticator driver of opennebula v6.10.0.1 allows attackers to execute arbitrary web scripts or HTML via a crafted payload.

Frequently asked questions

What is CVE-2025-56534?: A cross-site scripting (XSS) vulnerability in the custom authenticator driver of opennebula v6.10.0.1 allows attackers to execute arbitrary web scripts or HTML via a crafted payload.
How severe is CVE-2025-56534?: CVE-2025-56534 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2025-56534 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (8th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-56534?: CVE-2025-56534 affects Opennebula. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-56534?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-56534 have an EU (EUVD) identifier?: Yes. CVE-2025-56534 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-209587.
When was CVE-2025-56534 published?: CVE-2025-56534 was published on 2026-04-29 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:opennebula:opennebula:*:*:*:*:*:*:*:*

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