Is CVE-2013-6671 in the CISA KEV catalog?

No. CVE-2013-6671 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2013-6671?

CVE-2013-6671 has a CVSS v3 base score of 9.8 (CRITICAL).

What is the EPSS score for CVE-2013-6671?

CVE-2013-6671 has an EPSS score of 11.08% (95th percentile), estimating the probability of exploitation in the next 30 days.

CVE & CISA-KEV Catalog

CVE-2013-6671

CRITICALEPSS 95th pctl

9.8

CVSS v3

NVD

Description

The nsGfxScrollFrameInner::IsLTR function in Mozilla Firefox before 26.0, Firefox ESR 24.x before 24.2, Thunderbird before 24.2, and SeaMonkey before 2.23 allows remote attackers to execute arbitrary code via crafted use of JavaScript code for ordered list elements.

CWE-94Code Injection

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Exploit Intelligence

11.08%probability of exploitation in 30 days

95thpercentile

Very high risk: more likely to be exploited than 95% of all known CVEs.

References

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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.