Is CVE-2008-5513 in the CISA KEV catalog?

No. CVE-2008-5513 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2008-5513?

CVE-2008-5513 has a CVSS v2 base score of 4.3 (MEDIUM).

What is the EPSS score for CVE-2008-5513?

CVE-2008-5513 has an EPSS score of 1.78% (76th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2008-5513?

Upgrade DeveloperEdition to 3.0.5 or later. Fixes are available for 3 affected products.

CVE & CISA-KEV Catalog

CVE-2008-5513

MEDIUMEPSS 76th pctl

4.3

CVSS v2

NVD

Description

Unspecified vulnerability in the session-restore feature in Mozilla Firefox 3.x before 3.0.5 and 2.x before 2.0.0.19 allows remote attackers to bypass the same origin policy, inject content into documents associated with other domains, and conduct cross-site scripting (XSS) attacks via unknown vectors related to restoration of SessionStore data.

CWE-79Cross-Site Scripting (XSS)

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: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

1.78%probability of exploitation in 30 days

76thpercentile

Elevated risk: more likely to be exploited than 76% of all known CVEs.

References

Vendor Advisory1

mozilla.org

Third-Party Advisory22

Other references1

sunsolve.sun.com

Related Vulnerabilities

Other CWE-79 (Cross-Site Scripting (XSS)) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2020-11022	Medium	6.9	99%	-	Fix
CVE-2019-3929	Critical	9.8	99%	KEV	Fix
CVE-2020-9496	Medium	6.1	99%	-	-
CVE-2023-28341	Medium	6.1	99%	-	Fix
CVE-2018-12998	Medium	6.1	98%	-	-
CVE-2025-4123	High	7.6	98%	-	Fix

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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.