Is CVE-2015-4507 in the CISA KEV catalog?

No. CVE-2015-4507 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2015-4507?

CVE-2015-4507 has a CVSS v2 base score of 5.1 (MEDIUM).

What is the EPSS score for CVE-2015-4507?

CVE-2015-4507 has an EPSS score of 3.21% (87th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2015-4507?

Upgrade firefox on ubuntu 14.04 to 41.0+build3-0ubuntu0.14.04.1 or later.

CVE & CISA-KEV Catalog

CVE-2015-4507

MEDIUMEPSS 87th pctl

5.1

CVSS v2

NVD

Description

The SavedStacks class in the JavaScript implementation in Mozilla Firefox before 41.0, when the Debugger API is enabled, allows remote attackers to cause a denial of service (getSlotRef assertion failure and application exit) or possibly execute arbitrary code via a crafted web site.

How to fix

Remediation Available

firefoxUbuntu

Fixed in:41.0+build3-0ubuntu0.14.04.1USN-2743-1

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

3.21%probability of exploitation in 30 days

87thpercentile

Elevated risk: more likely to be exploited than 87% of all known CVEs.

References

Vendor Advisory1

mozilla.org

Other references10

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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.