Is CVE-2014-1500 in the CISA KEV catalog?

No. CVE-2014-1500 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2014-1500?

CVE-2014-1500 has a CVSS v2 base score of 5.0 (MEDIUM).

What is the EPSS score for CVE-2014-1500?

CVE-2014-1500 has an EPSS score of 3.54% (88th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2014-1500?

Upgrade DeveloperEdition to 28.0 or later. Fixes are available for 2 affected products.

CVE & CISA-KEV Catalog

CVE-2014-1500

MEDIUMEPSS 88th pctl

5.0

CVSS v2

NVD

Description

Mozilla Firefox before 28.0 and SeaMonkey before 2.25 allow remote attackers to cause a denial of service (resource consumption and application hang) via onbeforeunload events that trigger background JavaScript execution.

CWE-400Resource Exhaustion

How to fix

Remediation Available

DeveloperEditionWindows application

Affected:28.0Fixed in:28.0Mozilla

Mozilla Firefox (en-US)Windows application

Affected:28.0Fixed in:28.0Mozilla

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

3.54%probability of exploitation in 30 days

88thpercentile

Elevated risk: more likely to be exploited than 88% of all known CVEs.

References

Vendor Advisory2

Third-Party Advisory6

Related Vulnerabilities

Other CWE-400 (Resource Exhaustion) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2023-44487	High	7.5	100%	KEV	Fix
CVE-2021-44228	Critical	10.0	100%	KEV + Ransom	Fix
CVE-2011-3192	High	7.8	99%	-	Fix
CVE-2019-11478	Medium	5.3	95%	-	Fix
CVE-2024-25617	Medium	5.3	89%	-	Fix
CVE-2018-1000115	High	7.5	89%	-	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 2026-05-06.