How severe is CVE-2025-56536?

CVE-2025-56536 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-2025-56536 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-2025-56536?

CVE-2025-56536 affects Opennebula. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-56536?

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

Does CVE-2025-56536 have an EU (EUVD) identifier?

Yes. CVE-2025-56536 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-209589.

When was CVE-2025-56536 published?

CVE-2025-56536 was published on 2026-04-29 and last updated on 2026-06-17.

CVE-2025-56536

CVE-2025-56536 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-2025-209589
Weakness: CWE-79
Affected product: Opennebula
Published: 2026-04-29
Last modified: 2026-06-17

Description

A stored cross-site scripting (XSS) vulnerability in opennebula v6.10.0.1 allows attackers to execute arbitrary web scripts or HTML via injecting a crafted payload into the user information parameter.

Frequently asked questions

What is CVE-2025-56536?: A stored cross-site scripting (XSS) vulnerability in opennebula v6.10.0.1 allows attackers to execute arbitrary web scripts or HTML via injecting a crafted payload into the user information parameter.
How severe is CVE-2025-56536?: CVE-2025-56536 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-2025-56536 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-2025-56536?: CVE-2025-56536 affects Opennebula. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-56536?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-56536 have an EU (EUVD) identifier?: Yes. CVE-2025-56536 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-209589.
When was CVE-2025-56536 published?: CVE-2025-56536 was published on 2026-04-29 and last updated on 2026-06-17.

References

Affected products (1)

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

More vulnerabilities in Opennebula

CVE-2022-37425 — Critical (CVSS 9.9): Improper Neutralization of Special Elements used in a Command ('Command Injection') vulnerability in OpenNebula…
CVE-2022-37424 — Medium (CVSS 6.5): Files or Directories Accessible to External Parties vulnerability in OpenNebula on Linux allows File Discovery.
CVE-2025-56537 — Medium (CVSS 6.1): A stored cross-site scripting (XSS) vulnerability in opennebula v6.10.0.1 and fixed in v.7.0 allows attackers to…
CVE-2025-56535 — Medium (CVSS 6.1): A cross-site scripting (XSS) vulnerability in opennebula v6.10.0.1 allows attackers to execute arbitrary web scripts or…
CVE-2025-56534 — Medium (CVSS 6.1): A cross-site scripting (XSS) vulnerability in the custom authenticator driver of opennebula v6.10.0.1 allows attackers…
CVE-2022-37426 — Medium (CVSS 4.3): Unrestricted Upload of File with Dangerous Type vulnerability in OpenNebula OpenNebula core on Linux allows File…

All CVEs affecting Opennebula →

Other CWE-79 (Cross-site Scripting (XSS)) vulnerabilities

CVE-2025-49410 — Critical (CVSS 10.0): Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Imran Emu TC…
CVE-2024-47875 — Critical (CVSS 10.0): DOMPurify is a DOM-only, super-fast, uber-tolerant XSS sanitizer for HTML, MathML and SVG. DOMpurify was vulnerable to…
CVE-2024-6886 — Critical (CVSS 10.0): Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Gitea…
CVE-2023-45144 — Critical (CVSS 10.0): com.xwiki.identity-oauth:identity-oauth-ui is a package to aid in building identity and service providers based on…
CVE-2023-45138 — Critical (CVSS 10.0): Change Request is an pplication allowing users to request changes on a wiki without publishing the changes directly.…
CVE-2022-4361 — Critical (CVSS 10.0): Keycloak, an open-source identity and access management solution, has a cross-site scripting (XSS) vulnerability in the…

Browse all CWE-79 (Cross-site Scripting (XSS)) vulnerabilities →