Is CVE-2008-5014 being actively exploited?

CVE-2008-5014 is not currently listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

What is the CVSS score for CVE-2008-5014?

CVE-2008-5014 has a CVSS 2.0 base score of 10.0 (HIGH).

CVE-2008-5014

HIGH · CVSS 10.0EPSS 5.9%EU EUVD

jslock.cpp in Mozilla Firefox 3.x before 3.0.2, Firefox 2.x before 2.0.0.18, Thunderbird 2.x before 2.0.0.18, and SeaMonkey 1.x before 1.1.13 allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code by modifying the window.__proto__.__proto__ object in a way that causes a lock on a non-native object, which triggers an assertion failure related to the OBJ_IS_NATIVE function.

Key facts

CVSS score: 10.0 (v2.0)
Severity: HIGH
CVSS vector: AV:N/AC:L/Au:N/C:C/I:C/A:C
Weakness (CWE): CWE-20
EPSS score: 5.9% (93th percentile)
In CISA KEV: No
In EU EUVD: Yes (EUVD-2008-4993)
Published: November 13, 2008
NVD last modified: June 16, 2026
Status: Modified

EU Vulnerability Database (EUVD)

This vulnerability is also tracked by ENISA as EUVD-2008-4993 in the EU Vulnerability Database. Last updated in EUVD on August 7, 2024.

View on the EU Vulnerability Database

Affected products

canonical / ubuntu linux
canonical / ubuntu linux
canonical / ubuntu linux
canonical / ubuntu linux
debian / debian linux
mozilla / firefox
mozilla / seamonkey
mozilla / thunderbird

References

http://lists.opensuse.org/opensuse-security-announce/2008-11/msg00004.html(Third Party Advisory)
http://secunia.com/advisories/32011(Third Party Advisory)
http://secunia.com/advisories/32684(Third Party Advisory)
http://secunia.com/advisories/32693(Third Party Advisory)
http://secunia.com/advisories/32694(Third Party Advisory)
http://secunia.com/advisories/32695(Third Party Advisory)
http://secunia.com/advisories/32714(Third Party Advisory)
http://secunia.com/advisories/32715(Third Party Advisory)
http://secunia.com/advisories/32721(Third Party Advisory)
http://secunia.com/advisories/32778(Third Party Advisory)
http://secunia.com/advisories/32798(Third Party Advisory)
http://secunia.com/advisories/32845(Third Party Advisory)
http://secunia.com/advisories/32853(Third Party Advisory)
http://secunia.com/advisories/33433(Third Party Advisory)
http://secunia.com/advisories/33434(Third Party Advisory)
http://secunia.com/advisories/34501(Third Party Advisory)
http://sunsolve.sun.com/search/document.do?assetkey=1-26-256408-1(Broken Link)
http://ubuntu.com/usn/usn-667-1(Third Party Advisory)
http://www.debian.org/security/2008/dsa-1669(Third Party Advisory)
http://www.debian.org/security/2008/dsa-1671(Third Party Advisory)
http://www.debian.org/security/2009/dsa-1696(Third Party Advisory)
http://www.debian.org/security/2009/dsa-1697(Third Party Advisory)
http://www.mandriva.com/security/advisories?name=MDVSA-2008:228(Third Party Advisory)
http://www.mandriva.com/security/advisories?name=MDVSA-2008:230(Third Party Advisory)
http://www.mandriva.com/security/advisories?name=MDVSA-2008:235(Third Party Advisory)
http://www.mozilla.org/security/announce/2008/mfsa2008-50.html(Vendor Advisory)
http://www.redhat.com/support/errata/RHSA-2008-0976.html(Third Party Advisory)
http://www.redhat.com/support/errata/RHSA-2008-0977.html(Third Party Advisory)
http://www.redhat.com/support/errata/RHSA-2008-0978.html(Third Party Advisory)
http://www.securityfocus.com/bid/32281(Third Party Advisory, VDB Entry)
http://www.securitytracker.com/id?1021182(Third Party Advisory, VDB Entry)
http://www.us-cert.gov/cas/techalerts/TA08-319A.html(Third Party Advisory, US Government Resource)
http://www.vupen.com/english/advisories/2008/3146(Third Party Advisory)
http://www.vupen.com/english/advisories/2009/0977(Third Party Advisory)
https://bugzilla.mozilla.org/show_bug.cgi?id=436741(Issue Tracking, Vendor Advisory)
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A9157(Third Party Advisory)
https://www.redhat.com/archives/fedora-package-announce/2008-November/msg00366.html(Third Party Advisory)
https://www.redhat.com/archives/fedora-package-announce/2008-November/msg00385.html(Third Party Advisory)

Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS

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