Is CVE-2008-5510 in the CISA KEV catalog?

No. CVE-2008-5510 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2008-5510?

CVE-2008-5510 has a CVSS v2 base score of 5.0 (MEDIUM).

What is the EPSS score for CVE-2008-5510?

CVE-2008-5510 has an EPSS score of 2.21% (80th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2008-5510?

Upgrade DeveloperEdition to 2.0.0.19 or later. Fixes are available for 3 affected products.

CVE & CISA-KEV Catalog

CVE-2008-5510

MEDIUMEPSS 80th pctl

5.0

CVSS v2

NVD

Description

The CSS parser in Mozilla Firefox 3.x before 3.0.5 and 2.x before 2.0.0.19, Thunderbird 2.x before 2.0.0.19, and SeaMonkey 1.x before 1.1.14 ignores the '\0' escaped null character, which might allow remote attackers to bypass protection mechanisms such as sanitization routines.

How to fix

Remediation Available

DeveloperEditionWindows application

Affected:2.0 2.0.0.19Fixed in:2.0.0.19Mozilla

Affected:3.0 3.0.5Fixed in:3.0.5Mozilla

Mozilla Firefox (en-US)Windows application

Affected:3.0 3.0.5Fixed in:3.0.5Mozilla

Affected:2.0 2.0.0.19Fixed in:2.0.0.19Mozilla

Mozilla Thunderbird (en-US)Windows application

Affected:2.0 2.0.0.19Fixed in:2.0.0.19Mozilla

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

2.21%probability of exploitation in 30 days

80thpercentile

Elevated risk: more likely to be exploited than 80% of all known CVEs.

References

Embed a live status badge for CVE-2008-5510

Markdown

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HTML

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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.