CVE-2014-1487

CVE-2014-1487 is a high-severity vulnerability in Mozilla Firefox with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-346.

Key facts

• Severity: High (CVSS 3.x base score 7.5)
• CVSS v2: 5.0
• EPSS exploit prediction: 2% (82nd percentile)
• Actively exploited: Not listed in CISA KEV
• Weakness: CWE-346
• Affected product: Mozilla Firefox
• Published: 2014-02-06
• Last modified: 2026-06-17

Description

The Web workers implementation in Mozilla Firefox before 27.0, Firefox ESR 24.x before 24.3, Thunderbird before 24.3, and SeaMonkey before 2.24 allows remote attackers to bypass the Same Origin Policy and obtain sensitive authentication information via vectors involving error messages.

Frequently asked questions

What is CVE-2014-1487?

The Web workers implementation in Mozilla Firefox before 27.0, Firefox ESR 24.x before 24.3, Thunderbird before 24.3, and SeaMonkey before 2.24 allows remote attackers to bypass the Same Origin Policy and obtain sensitive authentication information via vectors involving error messages.

How severe is CVE-2014-1487?

CVE-2014-1487 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2014-1487 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (82nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2014-1487?

CVE-2014-1487 primarily affects Mozilla Firefox. In total, 26 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2014-1487?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2014-1487 published?

CVE-2014-1487 was published on 2014-02-06 and last updated on 2026-06-17.

References

• http://download.novell.com/Download?buildid=VYQsgaFpQ2k
• http://download.novell.com/Download?buildid=Y2fux-JW1Qc
• http://lists.fedoraproject.org/pipermail/package-announce/2014-February/127966.html
• http://lists.fedoraproject.org/pipermail/package-announce/2014-February/129218.html
• http://lists.opensuse.org/opensuse-security-announce/2014-02/msg00004.html
• http://lists.opensuse.org/opensuse-security-announce/2014-02/msg00005.html
• http://lists.opensuse.org/opensuse-security-announce/2014-02/msg00010.html
• http://lists.opensuse.org/opensuse-security-announce/2014-03/msg00017.html
• http://osvdb.org/102873
• http://rhn.redhat.com/errata/RHSA-2014-0132.html
• http://rhn.redhat.com/errata/RHSA-2014-0133.html
• http://secunia.com/advisories/56706
• http://secunia.com/advisories/56761
• http://secunia.com/advisories/56763
• http://secunia.com/advisories/56767
• http://secunia.com/advisories/56787
• http://secunia.com/advisories/56858
• http://secunia.com/advisories/56888
• http://secunia.com/advisories/56922
• http://www.debian.org/security/2014/dsa-2858
• http://www.mozilla.org/security/announce/2014/mfsa2014-09.html
• http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html
• http://www.securityfocus.com/bid/65330
• http://www.securitytracker.com/id/1029717
• http://www.securitytracker.com/id/1029720
• http://www.securitytracker.com/id/1029721
• http://www.ubuntu.com/usn/USN-2102-1
• http://www.ubuntu.com/usn/USN-2102-2
• http://www.ubuntu.com/usn/USN-2119-1
• https://8pecxstudios.com/?page_id=44080

Affected products (26)

• cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*
• cpe:2.3:a:mozilla:seamonkey:*:*:*:*:*:*:*:*
• cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*
• cpe:2.3:o:fedoraproject:fedora:19:*:*:*:*:*:*:*
• cpe:2.3:o:fedoraproject:fedora:20:*:*:*:*:*:*:*
• cpe:2.3:a:suse:suse_linux_enterprise_software_development_kit:11.0:sp3:*:*:*:*:*:*
• cpe:2.3:o:opensuse:opensuse:11.4:*:*:*:*:*:*:*
• cpe:2.3:o:opensuse:opensuse:12.3:*:*:*:*:*:*:*
• cpe:2.3:o:opensuse:opensuse:13.1:*:*:*:*:*:*:*
• cpe:2.3:o:suse:suse_linux_enterprise_desktop:11:sp3:*:*:*:*:*:*
• cpe:2.3:o:suse:suse_linux_enterprise_server:11:sp3:*:*:*:-:*:*
• cpe:2.3:o:suse:suse_linux_enterprise_server:11:sp3:*:*:*:vmware:*:*
• cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:esm:*:*:*
• cpe:2.3:o:canonical:ubuntu_linux:12.10:*:*:*:*:*:*:*
• cpe:2.3:o:canonical:ubuntu_linux:13.10:*:*:*:*:*:*:*
• cpe:2.3:o:debian:debian_linux:7.0:*:*:*:*:*:*:*
• cpe:2.3:o:redhat:enterprise_linux_desktop:5.0:*:*:*:*:*:*:*
• cpe:2.3:o:redhat:enterprise_linux_desktop:6.0:*:*:*:*:*:*:*
• cpe:2.3:o:redhat:enterprise_linux_eus:6.5:*:*:*:*:*:*:*
• cpe:2.3:o:redhat:enterprise_linux_server:5.0:*:*:*:*:*:*:*
• cpe:2.3:o:redhat:enterprise_linux_server:6.0:*:*:*:*:*:*:*
• cpe:2.3:o:redhat:enterprise_linux_server_aus:6.5:*:*:*:*:*:*:*
• cpe:2.3:o:redhat:enterprise_linux_server_eus:6.5:*:*:*:*:*:*:*
• cpe:2.3:o:redhat:enterprise_linux_server_tus:6.5:*:*:*:*:*:*:*
• cpe:2.3:o:redhat:enterprise_linux_workstation:5.0:*:*:*:*:*:*:*
• cpe:2.3:o:redhat:enterprise_linux_workstation:6.0:*:*:*:*:*:*:*

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