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CVE-2026-84165

Lack of authorisation in OpenNebula by OpenNebula Systems

A vulnerability relating to incorrect access control in OpenNebula by OpenNebula Systems, affecting all versions prior to 7.4. This vulnerability could allow an authenticated user with basic permissions to execute commands on virtual machines belonging to other users via the `one.vm.exec` function, without proper verification of access permissions. To exploit the vulnerability, it is only necessary to know the virtual machine’s identifier and for qemu-agent to be enabled on that machine. Exploitation could allow commands to be executed and compromise the confidentiality, integrity and availability of the affected virtual machines.

CVSS 4.0 · 8.7 High EPSS < 1% KEV · Not listed
CVE-2025-56535

Cross‑Site Scripting via Zone Attribute Parameter in OpenNebula

A 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 zone attribute parameter.

CVSS 3.1 · 6.1 Medium EPSS < 1% KEV · Not listed
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CVE-2025-56537

Stored XSS Vulnerability in OpenNebula 6.10.0.1 Virtual Network Template

A stored cross-site scripting (XSS) vulnerability in opennebula v6.10.0.1 and fixed in v.7.0 allows attackers to execute arbitrary web scripts or HTML via injecting a crafted payload into the virtual network template parameter.

CVSS 3.1 · 6.1 Medium EPSS < 1% KEV · Not listed
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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.

CVSS 3.1 · 6.1 Medium EPSS < 1% KEV · Not listed
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CVE-2025-56536

Stored XSS Vulnerability in OpenNebula v6.10.0.1 Allows Arbitrary Script Execution

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.

CVSS 3.1 · 6.1 Medium EPSS < 1% KEV · Not listed
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CVE-2025-54955

OpenNebula Community Edition (CE) before 7.0.0 and Enterprise Edition (EE) before 6.10.3 have a critical FireEdge race condition that can lead to full account takeover. By exploiting this, an unauthenticated attacker can obtain a valid JSON Web Token (JWT) belonging to a legitimate user without knowledge of their credentials.

CVSS 3.1 · 8.1 High EPSS < 1% KEV · Not listed
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CVE-2022-37425

The FILES directive inside a VM template allows execution of uploaded files when the template is instantiated, resulting in a Remote Code Execution (RCE) attack.

Improper Neutralization of Special Elements used in a Command ('Command Injection') vulnerability in OpenNebula OpenNebula core on Linux allows Remote Code Inclusion.

CVSS 3.1 · 9.9 Critical EPSS 1.6% KEV · Not listed
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CVE-2022-37424

The FILES Directive allows arbitrary files from the frontend system (including sensitive files) to be included when a VM is started from that template, which may result in Information Disclosure.

Files or Directories Accessible to External Parties vulnerability in OpenNebula on Linux allows File Discovery.

CVSS 3.1 · 6.5 Medium EPSS < 1% KEV · Not listed
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