Is CVE-2013-0747 in the CISA KEV catalog?

No. CVE-2013-0747 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2013-0747?

CVE-2013-0747 has a CVSS v2 base score of 6.8 (MEDIUM).

What is the EPSS score for CVE-2013-0747?

CVE-2013-0747 has an EPSS score of 2.19% (80th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2013-0747?

Upgrade DeveloperEdition to 18.0 or later. Fixes are available for 3 affected products.

CVE & CISA-KEV Catalog

CVE-2013-0747

MEDIUMEPSS 80th pctl

6.8

CVSS v2

NVD

Description

The gPluginHandler.handleEvent function in the plugin handler in Mozilla Firefox before 18.0, Firefox ESR 17.x before 17.0.2, Thunderbird before 17.0.2, Thunderbird ESR 17.x before 17.0.2, and SeaMonkey before 2.15 does not properly enforce the Same Origin Policy, which allows remote attackers to conduct clickjacking attacks via crafted JavaScript code that listens for a mutation event.

CWE-20Improper Input Validation

How to fix

Remediation Available

DeveloperEditionWindows application

Affected:18.0Fixed in:18.0Mozilla

Affected:17.0.2Fixed in:17.0.2Mozilla

Mozilla Firefox (en-US)Windows application

Affected:18.0Fixed in:18.0Mozilla

Affected:17.0.2Fixed in:17.0.2Mozilla

Mozilla Thunderbird (en-US)Windows application

Affected:17.0.2Fixed in:17.0.2Mozilla

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

2.19%probability of exploitation in 30 days

80thpercentile

Elevated risk: more likely to be exploited than 80% of all known CVEs.

References

Patch1

bugzilla.mozilla.org

Vendor Advisory1

mozilla.org

Third-Party Advisory8

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.