Is CVE-2013-6673 in the CISA KEV catalog?

No. CVE-2013-6673 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2013-6673?

CVE-2013-6673 has a CVSS v3 base score of 5.9 (MEDIUM).

What is the EPSS score for CVE-2013-6673?

CVE-2013-6673 has an EPSS score of 2.89% (85th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2013-6673?

Upgrade DeveloperEdition to 24.2 or later. Fixes are available for 3 affected products.

CVE & CISA-KEV Catalog

CVE-2013-6673

MEDIUMEPSS 85th pctl

5.9

CVSS v3

NVD

Description

Mozilla Firefox before 26.0, Firefox ESR 24.x before 24.2, Thunderbird before 24.2, and SeaMonkey before 2.23 do not recognize a user's removal of trust from an EV X.509 certificate, which makes it easier for man-in-the-middle attackers to spoof SSL servers in opportunistic circumstances via a valid certificate that is unacceptable to the user.

CWE-310Cryptographic Issues

How to fix

Remediation Available

DeveloperEditionWindows application

Affected:24.0 24.2Fixed in:24.2Mozilla

Affected:26.0Fixed in:26.0Mozilla

Mozilla Firefox (en-US)Windows application

Affected:26.0Fixed in:26.0Mozilla

Affected:24.0 24.2Fixed in:24.2Mozilla

Mozilla Thunderbird (en-US)Windows application

Affected:24.2Fixed in:24.2Mozilla

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

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityHigh

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityHigh

AvailabilityNone

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N

Exploit Intelligence

2.89%probability of exploitation in 30 days

85thpercentile

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

References

Related Vulnerabilities

Other CWE-310 (Cryptographic Issues) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2014-3566	Low	3.4	100%	-	Fix
CVE-2015-4000	Low	3.7	100%	-	Fix
CVE-2015-0204	Medium	4.3	99%	-	Fix
CVE-2016-2107	Medium	5.9	89%	-	Fix
CVE-2016-0800	Medium	5.9	82%	-	Fix
CVE-2014-8684	Critical	9.8	72%	-	-

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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.