How severe is CVE-2002-2436?

CVE-2002-2436 has a CVSS 2.0 base score of 4.3, rated medium severity.

Is CVE-2002-2436 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (64th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2002-2436?

CVE-2002-2436 primarily affects Mozilla Firefox. In total, 150 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2002-2436?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2002-2436 published?

CVE-2002-2436 was published on 2011-12-07 and last updated on 2026-06-16.

CVE-2002-2436

CVE-2002-2436 is a medium-severity vulnerability in Mozilla Firefox with a CVSS 2.0 base score of 4.3. 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-200.

Key facts

Severity: Medium (CVSS 2.0 base score 4.3)
EPSS exploit prediction: 1% (64th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-200
Affected product: Mozilla Firefox
Published: 2011-12-07
Last modified: 2026-06-16

Description

The Cascading Style Sheets (CSS) implementation in Mozilla Firefox before 4.0, Thunderbird before 3.3, and SeaMonkey before 2.1 does not properly handle the :visited pseudo-class, which allows remote attackers to obtain sensitive information about visited web pages via a crafted HTML document, a related issue to CVE-2010-2264.

Frequently asked questions

What is CVE-2002-2436?: The Cascading Style Sheets (CSS) implementation in Mozilla Firefox before 4.0, Thunderbird before 3.3, and SeaMonkey before 2.1 does not properly handle the :visited pseudo-class, which allows remote attackers to obtain sensitive information about visited web pages via a crafted HTML document, a related issue to CVE-2010-2264.
How severe is CVE-2002-2436?: CVE-2002-2436 has a CVSS 2.0 base score of 4.3, rated medium severity.
Is CVE-2002-2436 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (64th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2002-2436?: CVE-2002-2436 primarily affects Mozilla Firefox. In total, 150 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2002-2436?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2002-2436 published?: CVE-2002-2436 was published on 2011-12-07 and last updated on 2026-06-16.

References

Affected products (150)

cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:3.0:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:3.0.1:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:3.0.2:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:3.0.3:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:3.0.4:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:3.0.5:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:3.0.6:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:3.0.7:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:3.0.8:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:3.0.9:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:3.0.10:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:3.0.11:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:3.0.12:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:3.0.13:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:3.0.14:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:3.0.15:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:3.0.16:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:3.0.17:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:3.5:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:3.5.1:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:3.5.2:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:3.5.3:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:3.5.4:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:3.5.5:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:3.5.6:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:3.5.7:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:3.5.8:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:3.5.9:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:3.5.10:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:3.5.11:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:3.5.12:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:3.5.13:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:3.5.14:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:3.5.15:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:3.6:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:3.6.1:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:3.6.2:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:3.6.3:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:3.6.4:*:*:*:*:*:*:*

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