Is CVE-2012-4205 in the CISA KEV catalog?

No. CVE-2012-4205 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2012-4205?

CVE-2012-4205 has a CVSS v2 base score of 6.8 (MEDIUM).

What is the EPSS score for CVE-2012-4205?

CVE-2012-4205 has an EPSS score of 1.61% (73th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2012-4205?

Upgrade DeveloperEdition to 17.0 or later. Fixes are available for 3 affected products.

CVE & CISA-KEV Catalog

CVE-2012-4205

MEDIUMEPSS 73th pctl

6.8

CVSS v2

NVD

Description

Mozilla Firefox before 17.0, Thunderbird before 17.0, and SeaMonkey before 2.14 assign the system principal, rather than the sandbox principal, to XMLHttpRequest objects created in sandboxes, which allows remote attackers to conduct cross-site request forgery (CSRF) attacks or obtain sensitive information by leveraging a sandboxed add-on.

CWE-352Cross-Site Request Forgery

How to fix

Remediation Available

DeveloperEditionWindows application

Affected:17.0Fixed in:17.0Mozilla

Mozilla Firefox (en-US)Windows application

Affected:17.0Fixed in:17.0Mozilla

Mozilla Thunderbird (en-US)Windows application

Affected:17.0Fixed in:17.0Mozilla

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

1.61%probability of exploitation in 30 days

73rdpercentile

Elevated risk: more likely to be exploited than 73% of all known CVEs.

References

Vendor Advisory2

Third-Party Advisory12

Other references6

Related Vulnerabilities

Other CWE-352 (Cross-Site Request Forgery) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2016-6277	High	8.8	100%	KEV	-
CVE-2014-0054	Medium	6.8	91%	-	Fix
CVE-2013-6429	Medium	6.8	90%	-	Fix
CVE-2022-41622	High	8.8	88%	-	-
CVE-2018-7700	High	8.8	75%	-	-
CVE-2015-2295	Medium	6.8	66%	-	-

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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.