Is CVE-2015-4498 in the CISA KEV catalog?

No. CVE-2015-4498 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2015-4498?

CVE-2015-4498 has a CVSS v2 base score of 7.5 (HIGH).

What is the EPSS score for CVE-2015-4498?

CVE-2015-4498 has an EPSS score of 2.68% (84th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2015-4498?

Upgrade firefox on ubuntu 14.04 to 40.0.3+build1-0ubuntu0.14.04.1 or later.

CVE & CISA-KEV Catalog

CVE-2015-4498

HIGHEPSS 84th pctl

7.5

CVSS v2

NVD

Description

The add-on installation feature in Mozilla Firefox before 40.0.3 and Firefox ESR 38.x before 38.2.1 allows remote attackers to bypass an intended user-confirmation requirement by constructing a crafted data: URL and triggering navigation to an arbitrary http: or https: URL at a certain early point in the installation process.

CWE-254

How to fix

Remediation Available

firefoxUbuntu

Fixed in:40.0.3+build1-0ubuntu0.14.04.1USN-2723-1

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

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

2.68%probability of exploitation in 30 days

84thpercentile

Elevated risk: more likely to be exploited than 84% of all known CVEs.

References

Vendor Advisory1

mozilla.org

Other references10

Related Vulnerabilities

Other CWE-254 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2016-0161	Medium	6.5	69%	-	-
CVE-2016-2296	Critical	9.4	64%	-	-
CVE-2015-1793	Medium	6.5	62%	-	Fix
CVE-2016-2118	High	7.5	37%	-	Fix
CVE-2016-3238	High	8.1	35%	-	-
CVE-2016-3198	Medium	6.5	32%	-	-

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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 2026-05-06.