How severe is CVE-2012-3540?

CVE-2012-3540 has a CVSS 2.0 base score of 5.8, rated medium severity.

Is CVE-2012-3540 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (85th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2012-3540?

CVE-2012-3540 affects Openstack Horizon. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2012-3540?

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

When was CVE-2012-3540 published?

CVE-2012-3540 was published on 2012-09-05 and last updated on 2026-06-16.

CVE-2012-3540

CVE-2012-3540 is a medium-severity vulnerability in Openstack Horizon with a CVSS 2.0 base score of 5.8. 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-20.

Key facts

Severity: Medium (CVSS 2.0 base score 5.8)
EPSS exploit prediction: 3% (85th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Openstack Horizon
Published: 2012-09-05
Last modified: 2026-06-16

Description

Open redirect vulnerability in views/auth_forms.py in OpenStack Dashboard (Horizon) Essex (2012.1) allows remote attackers to redirect users to arbitrary web sites and conduct phishing attacks via a URL in the next parameter to auth/login/. NOTE: this issue was originally assigned CVE-2012-3542 by mistake.

Frequently asked questions

What is CVE-2012-3540?: Open redirect vulnerability in views/auth_forms.py in OpenStack Dashboard (Horizon) Essex (2012.1) allows remote attackers to redirect users to arbitrary web sites and conduct phishing attacks via a URL in the next parameter to auth/login/. NOTE: this issue was originally assigned CVE-2012-3542 by mistake.
How severe is CVE-2012-3540?: CVE-2012-3540 has a CVSS 2.0 base score of 5.8, rated medium severity.
Is CVE-2012-3540 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (85th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2012-3540?: CVE-2012-3540 affects Openstack Horizon. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2012-3540?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2012-3540 published?: CVE-2012-3540 was published on 2012-09-05 and last updated on 2026-06-16.

References

Affected products (1)

cpe:2.3:a:openstack:horizon:2012.1:*:*:*:*:*:*:*

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