Is CVE-2008-5501 in the CISA KEV catalog?

No. CVE-2008-5501 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2008-5501?

CVE-2008-5501 has a CVSS v2 base score of 5.0 (MEDIUM).

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

CVE-2008-5501 has an EPSS score of 3.14% (86th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2008-5501?

Upgrade DeveloperEdition to 3.0.5 or later. Fixes are available for 2 affected products.

CVE & CISA-KEV Catalog

CVE-2008-5501

MEDIUMEPSS 86th pctl

5.0

CVSS v2

NVD

Description

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.

How to fix

Remediation Available

DeveloperEditionWindows application

Affected:3.0 3.0.5Fixed in:3.0.5Mozilla

Affected:2.0 2.0.0.19Fixed in:2.0.0.19Mozilla

Mozilla Firefox (en-US)Windows application

Affected:2.0 2.0.0.19Fixed in:2.0.0.19Mozilla

Affected:3.0 3.0.5Fixed in:3.0.5Mozilla

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

3.14%probability of exploitation in 30 days

86thpercentile

Elevated risk: more likely to be exploited than 86% of all known CVEs.

References

Vendor Advisory2

Third-Party Advisory16

Other references1

sunsolve.sun.com

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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 2026-04-23.