GHSA-27q4-38qf-m25h · Severity: medium · Ecosystem: pip — OpenStack Compute Nova Improper Access Control
The XenAPI backend in OpenStack Compute (Nova) Folsom, Grizzly, and Havana before 2013.2 does not properly apply security groups (1) when resizing an image or (2) during live migration, which allows remote attackers to bypass intended restrictions.
Conclusion & alert: CVE-2013-4497 is rated Moderate Risk (53.7/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 1.81%). Core evidence: EPSS rose +1.60% over the last day, indicating growing attacker interest. Mandatory action: Review affected assets and schedule remediation.
Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.
EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).
| # | Date | Old EPSS score | New EPSS score | Delta (New - Old) |
|---|---|---|---|---|
| 1 | 2026-06-15 | 0.21% | 1.81% | +1.60% |
| 2 | 2026-05-24 | 0.09% | 0.21% | +0.12% |
| 3 | 2025-03-30 | — | 0.09% | — |
Full EPSS history (11 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 6.4 | 2.0 | MEDIUM |
|
10.0 | 4.9 | [email protected] |
GHSA-27q4-38qf-m25h · Severity: medium · Ecosystem: pip — OpenStack Compute Nova Improper Access Control
| vendor | priority | summary | link |
|---|---|---|---|
debian
|
not yet assigned | CVE-2013-4497 not yet assigned priority: Debian including 1 source packages (nova), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. | https://security-tracker.debian.org/tracker/CVE-2013-4497 |
redhat
|
low | — | https://access.redhat.com/security/cve/CVE-2013-4497 |
ubuntu
|
medium | CVE-2013-4497 medium priority: Ubuntu including 1 source packages (nova), 7 status rows across 7 suites (lucid, precise, quantal, raring, saucy, trusty, upstream): DNE 2, ignored 2, not-affected 2, released 1. | https://ubuntu.com/security/CVE-2013-4497 |
| Vendor | Product | Version | Raw CPE |
|---|---|---|---|
| openstack | havana | <= havana-3 | cpe:2.3:a:openstack:havana:*:*:*:*:*:*:*:* |
| openstack | havana | havana-1 | cpe:2.3:a:openstack:havana:havana-1:*:*:*:*:*:*:* |
| openstack | havana | havana-2 | cpe:2.3:a:openstack:havana:havana-2:*:*:*:*:*:*:* |
| openstack | grizzly | — | cpe:2.3:a:openstack:grizzly:-:*:*:*:*:*:*:* |
| openstack | folsom | — | cpe:2.3:a:openstack:folsom:-:*:*:*:*:*:*:* |