What is CVE-2025-56534?

CVE-2025-56534 is a medium-severity vulnerability in Opennebula, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2026-04-29.

How severe is CVE-2025-56534?

Medium severity. CVSS v3 base score is 6.1 out of 10.

Is CVE-2025-56534 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

XSS in Opennebula

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.

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.000 (9.9th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

Affected products

Opennebula
N/a — versions n/a

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

Public proof-of-concept exploits

MarkArtamonov/OpenNebula-CVE-2025-56534

References

cve@mitre.org (Product)
cve@mitre.org (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2025-56534?: CVE-2025-56534 is a medium-severity vulnerability in Opennebula, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2026-04-29.
How severe is CVE-2025-56534?: Medium severity. CVSS v3 base score is 6.1 out of 10.
Is CVE-2025-56534 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.