Is CVE-2008-5501 being actively exploited?

CVE-2008-5501 is not currently listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

What is the CVSS score for CVE-2008-5501?

CVE-2008-5501 has a CVSS 2.0 base score of 5.0 (MEDIUM).

CVE-2008-5501

MEDIUM · CVSS 5.0EPSS 3.1%EU EUVD

The layout engine in Mozilla Firefox 3.x before 3.0.5, Thunderbird 2.x before 2.0.0.19, and SeaMonkey 1.x before 1.1.14 allows remote attackers to cause a denial of service via vectors that trigger an assertion failure.

Key facts

CVSS score: 5.0 (v2.0)
Severity: MEDIUM
CVSS vector: AV:N/AC:L/Au:N/C:N/I:N/A:P
EPSS score: 3.1% (88th percentile)
In CISA KEV: No
In EU EUVD: Yes (EUVD-2008-5478)
Published: December 17, 2008
NVD last modified: June 16, 2026
Status: Modified

EU Vulnerability Database (EUVD)

This vulnerability is also tracked by ENISA as EUVD-2008-5478 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
mozilla / firefox
mozilla / seamonkey

References

http://secunia.com/advisories/33188(Third Party Advisory)
http://secunia.com/advisories/33189(Third Party Advisory)
http://secunia.com/advisories/33203(Third Party Advisory)
http://secunia.com/advisories/33216(Third Party Advisory)
http://secunia.com/advisories/33421(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://www.mandriva.com/security/advisories?name=MDVSA-2008:245(Third Party Advisory)
http://www.mozilla.org/security/announce/2008/mfsa2008-60.html(Vendor Advisory)
http://www.redhat.com/support/errata/RHSA-2008-1036.html(Third Party Advisory)
http://www.redhat.com/support/errata/RHSA-2008-1037.html(Third Party Advisory)
http://www.redhat.com/support/errata/RHSA-2009-0002.html(Third Party Advisory)
http://www.securityfocus.com/bid/32882(Third Party Advisory, VDB Entry)
http://www.securitytracker.com/id?1021417(Third Party Advisory, VDB Entry)
http://www.vupen.com/english/advisories/2009/0977(Third Party Advisory)
https://bugzilla.mozilla.org/show_bug.cgi?id=395623(Issue Tracking, Vendor Advisory)
https://exchange.xforce.ibmcloud.com/vulnerabilities/47407(Third Party Advisory, VDB Entry)
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10257(Third Party Advisory)
https://usn.ubuntu.com/690-1/(Third Party Advisory)

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

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