How severe is CVE-2006-2723?

CVE-2006-2723 has a CVSS 2.0 base score of 5.0, rated medium severity.

Is CVE-2006-2723 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (86th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2006-2723?

CVE-2006-2723 affects Mozilla Firefox. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2006-2723?

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

When was CVE-2006-2723 published?

CVE-2006-2723 was published on 2006-06-01 and last updated on 2026-06-16.

CVE-2006-2723

CVE-2006-2723 is a medium-severity vulnerability in Mozilla Firefox with a CVSS 2.0 base score of 5.0. 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 5.0)
EPSS exploit prediction: 3% (86th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Mozilla Firefox
Published: 2006-06-01
Last modified: 2026-06-16

Description

Unspecified versions of Mozilla Firefox allow remote attackers to cause a denial of service (crash) via a web page that contains a large number of nested marquee tags. NOTE: a followup post indicated that the initial report could not be verified.

Frequently asked questions

What is CVE-2006-2723?: Unspecified versions of Mozilla Firefox allow remote attackers to cause a denial of service (crash) via a web page that contains a large number of nested marquee tags. NOTE: a followup post indicated that the initial report could not be verified.
How severe is CVE-2006-2723?: CVE-2006-2723 has a CVSS 2.0 base score of 5.0, rated medium severity.
Is CVE-2006-2723 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (86th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2006-2723?: CVE-2006-2723 affects Mozilla Firefox. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2006-2723?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2006-2723 published?: CVE-2006-2723 was published on 2006-06-01 and last updated on 2026-06-16.

References

Affected products (1)

cpe:2.3:a:mozilla:firefox:2.0:rc3:*:*:*:*:*:*

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