How severe is CVE-2012-5571?

CVE-2012-5571 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2012-5571 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (81st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2012-5571?

CVE-2012-5571 primarily affects Openstack Essex. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2012-5571?

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

When was CVE-2012-5571 published?

CVE-2012-5571 was published on 2012-12-18 and last updated on 2026-06-16.

CVE-2012-5571

CVE-2012-5571 is a medium-severity vulnerability in Openstack Essex with a CVSS 3.x base score of 5.4. 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-639.

Key facts

Severity: Medium (CVSS 3.x base score 5.4)
CVSS v2: 3.5
EPSS exploit prediction: 2% (81st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-639
Affected product: Openstack Essex
Published: 2012-12-18
Last modified: 2026-06-16

Description

A flaw was found in OpenStack Keystone. This vulnerability allows remote authenticated users to bypass intended authorization restrictions. This occurs because OpenStack Keystone does not properly handle EC2 (Elastic Compute Cloud) tokens when a user's role has been removed from a tenant. An attacker can leverage a token associated with a removed user role to gain unauthorized access.

Frequently asked questions

What is CVE-2012-5571?: A flaw was found in OpenStack Keystone. This vulnerability allows remote authenticated users to bypass intended authorization restrictions. This occurs because OpenStack Keystone does not properly handle EC2 (Elastic Compute Cloud) tokens when a user's role has been removed from a tenant. An attacker can leverage a token associated with a removed user role to gain unauthorized access.
How severe is CVE-2012-5571?: CVE-2012-5571 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2012-5571 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (81st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2012-5571?: CVE-2012-5571 primarily affects Openstack Essex. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2012-5571?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2012-5571 published?: CVE-2012-5571 was published on 2012-12-18 and last updated on 2026-06-16.

References

Affected products (2)

cpe:2.3:a:openstack:essex:2012.1:*:*:*:*:*:*:*
cpe:2.3:a:openstack:folsom:2012.2:*:*:*:*:*:*:*

More vulnerabilities in Openstack Essex

CVE-2013-0261 — High (CVSS 8.8): A flaw was found in PackStack. A local user could exploit a symlink attack on a temporary file with a predictable name…
CVE-2013-0335 — High (CVSS 7.6): OpenStack Compute (Nova) Grizzly, Folsom (2012.2), and Essex (2012.1) allows remote authenticated users to gain access…
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