How severe is CVE-2005-4685?

CVE-2005-4685 has a CVSS 2.0 base score of 6.4, rated medium severity.

Is CVE-2005-4685 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (63rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2005-4685?

CVE-2005-4685 primarily affects Mozilla Firefox. In total, 79 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2005-4685?

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

When was CVE-2005-4685 published?

CVE-2005-4685 was published on 2005-12-31 and last updated on 2026-06-16.

CVE-2005-4685

CVE-2005-4685 is a medium-severity vulnerability in Mozilla Firefox with a CVSS 2.0 base score of 6.4. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: Medium (CVSS 2.0 base score 6.4)
EPSS exploit prediction: 1% (63rd percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Mozilla Firefox
Published: 2005-12-31
Last modified: 2026-06-16

Description

Firefox and Mozilla can associate a cookie with multiple domains when the DNS resolver has a non-root domain in its search list, which allows remote attackers to trick a user into accepting a cookie for a hostname formed via search-list expansion of the hostname entered by the user, or steal a cookie for an expanded hostname, as demonstrated by an attacker who operates an ap1.com Internet web site to steal cookies associated with an ap1.com.example.com intranet web site.

Frequently asked questions

What is CVE-2005-4685?: Firefox and Mozilla can associate a cookie with multiple domains when the DNS resolver has a non-root domain in its search list, which allows remote attackers to trick a user into accepting a cookie for a hostname formed via search-list expansion of the hostname entered by the user, or steal a cookie for an expanded hostname, as demonstrated by an attacker who operates an ap1.com Internet web site to steal cookies associated with an ap1.com.example.com intranet web site.
How severe is CVE-2005-4685?: CVE-2005-4685 has a CVSS 2.0 base score of 6.4, rated medium severity.
Is CVE-2005-4685 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (63rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2005-4685?: CVE-2005-4685 primarily affects Mozilla Firefox. In total, 79 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2005-4685?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2005-4685 published?: CVE-2005-4685 was published on 2005-12-31 and last updated on 2026-06-16.

References

Affected products (79)

cpe:2.3:a:mozilla:firefox:0.8:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:0.9:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:0.9:rc:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:0.9.1:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:0.9.2:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:0.9.3:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:0.10:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:0.10.1:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:1.0:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:1.0.1:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:1.0.2:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:1.0.3:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:1.0.4:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:1.0.5:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:1.0.6:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:1.0.7:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:1.5:beta1:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:1.5:beta2:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:preview_release:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:mozilla:0.8:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:mozilla:0.9.2:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:mozilla:0.9.2.1:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:mozilla:0.9.3:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:mozilla:0.9.4:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:mozilla:0.9.4.1:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:mozilla:0.9.5:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:mozilla:0.9.6:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:mozilla:0.9.7:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:mozilla:0.9.8:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:mozilla:0.9.9:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:mozilla:0.9.35:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:mozilla:0.9.48:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:mozilla:1.0:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:mozilla:1.0:rc1:*:*:*:*:*:*
cpe:2.3:a:mozilla:mozilla:1.0:rc2:*:*:*:*:*:*
cpe:2.3:a:mozilla:mozilla:1.0.1:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:mozilla:1.0.2:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:mozilla:1.1:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:mozilla:1.1:alpha:*:*:*:*:*:*
cpe:2.3:a:mozilla:mozilla:1.1:beta:*:*:*:*:*:*

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