CVE-2014-1500

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.

Published: 2014-03-19 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2014-1500 is rated Moderate Risk (52/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 3.54%). EPSS rose +1.28% over the last day, indicating growing attacker interest. Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2014-1500

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 2.26% 3.54% +1.28%
2 2025-03-30 6.84% 2.26% -4.58%
3 2025-03-29 — 6.84% —

Full EPSS history (8 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2014-1500

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
5.0 2.0 MEDIUM
AV:N/AC:L/Au:N/C:N/I:N/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:P)
Partial availability impact.
 10.0 2.9 [email protected]

Weakness enumeration for CVE-2014-1500

OS Trackers for CVE-2014-1500

vendor priority summary link
gentoo normal CVE-2014-1500: 1 GLSA(s) (201504-01), 7 atom(s) (dev-libs/nspr, mail-client/thunderbird, …); latest impact normal. https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2014-1500
redhat medium — https://access.redhat.com/security/cve/CVE-2014-1500
suse critical CVE-2014-1500 severity critical: SUSE including 37 source package names (MozillaFirefox-140.2.0-160000.1.2, MozillaFirefox-24.4.0esr-0.5.5.1, …), 55 product×package rows across 10 product lines (SUSE Linux Enterprise Desktop 11 SP3, SUSE Linux Enterprise Module for Desktop Applications 15, … (10 product lines)): Fixed 55. https://www.suse.com/security/cve/CVE-2014-1500/
ubuntu low CVE-2014-1500 low priority: Ubuntu including 1 source packages (firefox), 5 status rows across 5 suites (lucid, precise, quantal, saucy, upstream): released 4, ignored 1. https://ubuntu.com/security/CVE-2014-1500

Affected software / configurations for CVE-2014-1500

Vendor Product Version Raw CPE
opensuse opensuse 13.1 cpe:2.3:o:opensuse:opensuse:13.1:*:*:*:*:*:*:*
opensuse_project opensuse 11.4 cpe:2.3:o:opensuse_project:opensuse:11.4:*:*:*:*:*:*:*
opensuse_project opensuse 12.3 cpe:2.3:o:opensuse_project:opensuse:12.3:*:*:*:*:*:*:*
oracle solaris 11.3 cpe:2.3:o:oracle:solaris:11.3:*:*:*:*:*:*:*
mozilla firefox < 28.0 cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*
mozilla seamonkey < 2.25 cpe:2.3:a:mozilla:seamonkey:*:*:*:*:*:*:*:*
suse linux_enterprise_desktop 11 cpe:2.3:o:suse:linux_enterprise_desktop:11:sp3:*:*:*:*:*:*
suse linux_enterprise_server 11 cpe:2.3:o:suse:linux_enterprise_server:11:sp3:*:*:*:*:*:*
suse linux_enterprise_server 11 cpe:2.3:o:suse:linux_enterprise_server:11:sp3:*:*:*:vmware:*:*
suse linux_enterprise_software_development_kit 11 cpe:2.3:o:suse:linux_enterprise_software_development_kit:11:sp3:*:*:*:*:*:*

References for CVE-2014-1500

cvelogic Threat Intelligence