Is CVE-2012-3540 in the CISA KEV catalog?

No. CVE-2012-3540 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2012-3540?

CVE-2012-3540 has a CVSS v2 base score of 5.8 (MEDIUM).

What is the EPSS score for CVE-2012-3540?

CVE-2012-3540 has an EPSS score of 2.90% (85th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2012-3540?

Upgrade horizon on debian 11 to 2012.1.1-4 or later.

CVE & CISA-KEV Catalog

CVE-2012-3540

MEDIUMEPSS 85th pctl

5.8

CVSS v2

NVD

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.

CWE-20Improper Input Validation

How to fix

Remediation Available

horizonDebian

Fixed in:2012.1.1-4CVE-2012-3540

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v2 Vector

No CVSS vector data available.

Exploit Intelligence

2.90%probability of exploitation in 30 days

85thpercentile

Elevated risk: more likely to be exploited than 85% of all known CVEs.

References

Patch1

github.com

Vendor Advisory1

secunia.com

Other references8

Related Vulnerabilities

Other CWE-20 (Improper Input Validation) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2024-3400	Critical	10.0	100%	KEV + Ransom	-
CVE-2021-45105	Medium	5.9	100%	-	Fix
CVE-2021-44228	Critical	10.0	100%	KEV + Ransom	Fix
CVE-2021-21985	Critical	9.8	100%	KEV + Ransom	Fix
CVE-2018-7600	Critical	9.8	100%	KEV + Ransom	Fix
CVE-2020-3452	High	7.5	100%	KEV	Fix

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-04-29.