How severe is CVE-2008-5504?

CVE-2008-5504 has a CVSS 2.0 base score of 7.5, rated high severity.

Is CVE-2008-5504 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (83rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2008-5504?

CVE-2008-5504 primarily affects Mozilla Firefox. In total, 19 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2008-5504?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2008-5504 published?

CVE-2008-5504 was published on 2008-12-17 and last updated on 2026-06-16.

CVE-2008-5504

CVE-2008-5504 is a high-severity vulnerability in Mozilla Firefox with a CVSS 2.0 base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-264.

Key facts

Severity: High (CVSS 2.0 base score 7.5)
EPSS exploit prediction: 3% (83rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-264
Affected product: Mozilla Firefox
Published: 2008-12-17
Last modified: 2026-06-16

Description

Mozilla Firefox 2.x before 2.0.0.19 allows remote attackers to run arbitrary JavaScript with chrome privileges via vectors related to the feed preview, a different vulnerability than CVE-2008-3836.

Frequently asked questions

What is CVE-2008-5504?: Mozilla Firefox 2.x before 2.0.0.19 allows remote attackers to run arbitrary JavaScript with chrome privileges via vectors related to the feed preview, a different vulnerability than CVE-2008-3836.
How severe is CVE-2008-5504?: CVE-2008-5504 has a CVSS 2.0 base score of 7.5, rated high severity.
Is CVE-2008-5504 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (83rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2008-5504?: CVE-2008-5504 primarily affects Mozilla Firefox. In total, 19 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2008-5504?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2008-5504 published?: CVE-2008-5504 was published on 2008-12-17 and last updated on 2026-06-16.

References

Affected products (19)

cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:2.0:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:2.0.0.1:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:2.0.0.2:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:2.0.0.3:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:2.0.0.4:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:2.0.0.5:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:2.0.0.6:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:2.0.0.7:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:2.0.0.8:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:2.0.0.9:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:2.0.0.10:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:2.0.0.11:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:2.0.0.12:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:2.0.0.13:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:2.0.0.14:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:2.0.0.15:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:2.0.0.16:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:2.0.0.17:*:*:*:*:*:*:*

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