Security readout for executives and security teams
Plain-English summary
CVE-2025-56534 is a medium-severity cross-site scripting issue reported in OpenNebula v6.10.0.1’s custom authenticator driver. An attacker could craft input that causes a user’s browser to run unwanted script or HTML. This typically requires user interaction and mainly threatens session trust, data exposure, or unauthorized actions within the web interface.
Executive priority
Treat as a near-term remediation item for OpenNebula environments, not an emergency unless the interface is exposed or widely used. Prioritize confirmation of version and authenticator usage, then follow vendor guidance. Risk is moderate because user interaction is required and availability impact is not reported.
Technical view
The CVE describes CWE-79 XSS in the OpenNebula 6.10.0.1 custom authenticator driver. CVSS 3.1 is 6.1: network reachable, low complexity, no privileges required, user interaction required, changed scope, low confidentiality and integrity impact, no availability impact. The affected product metadata is incomplete in the CVE record, but the description names OpenNebula v6.10.0.1.
Likely exposure
Organizations running OpenNebula v6.10.0.1, especially deployments using the custom authenticator driver, should assess exposure. Internet-facing or broadly accessible OpenNebula web interfaces have higher practical risk. The CVE record does not provide complete CPE or affected-version metadata.
Exploitation context
The CVE record does not indicate known active exploitation, and it is not listed as KEV in the provided data. A public GitHub reference exists, so defenders should assume technical details may be accessible. Exploitation requires a victim to interact with crafted content or a crafted authentication-related flow.
Researcher notes
Evidence is limited to the CVE description, CVSS vector, and public references. The CVE affected-product fields are marked n/a, creating ambiguity beyond OpenNebula v6.10.0.1 named in the description. Do not infer additional affected versions or fixed versions without vendor confirmation.
Mitigation direction
- Check OpenNebula vendor guidance for an advisory, patch, or supported upgrade path.
- Restrict OpenNebula web interface access to trusted networks and administrators.
- Review whether the custom authenticator driver is enabled or required.
- Apply input validation and output encoding controls where custom authentication code is maintained.
- Monitor vendor and CVE records for affected-version clarification.
Validation and detection
- Inventory OpenNebula instances and confirm exact version numbers.
- Identify deployments using the custom authenticator driver.
- Review access controls for the OpenNebula web interface.
- Check logs for suspicious authentication-related parameters or unusual browser script errors.
- Validate remediation only in a controlled, authorized test environment.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-79: User-session and phishing behavior lookup
Client-side and session-facing weaknesses should be reviewed alongside initial-access and user-execution behaviors. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2025-56534 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Medium
- CVSS
- 6.1 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N2.82.7Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
6.1MediumVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Source materials
- CVE List V5 sourceCVE List V5
- https://opennebula.io/opennebula-7/CVE reference
- https://github.com/MarkArtamonov/OpenNebula-CVE-2025-56534CVE reference
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.