How severe is CVE-2006-6507?

CVE-2006-6507 has a CVSS 2.0 base score of 4.3, rated medium severity.

Is CVE-2006-6507 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (74th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2006-6507?

CVE-2006-6507 affects Mozilla Firefox. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2006-6507?

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

When was CVE-2006-6507 published?

CVE-2006-6507 was published on 2006-12-20 and last updated on 2026-06-16.

CVE-2006-6507

CVE-2006-6507 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.

Key facts

Severity: Medium (CVSS 2.0 base score 4.3)
EPSS exploit prediction: 2% (74th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Mozilla Firefox
Published: 2006-12-20
Last modified: 2026-06-16

Description

Mozilla Firefox 2.0 before 2.0.0.1 allows remote attackers to bypass Cross-Site Scripting (XSS) protection via vectors related to a Function.prototype regression error.

Frequently asked questions

What is CVE-2006-6507?: Mozilla Firefox 2.0 before 2.0.0.1 allows remote attackers to bypass Cross-Site Scripting (XSS) protection via vectors related to a Function.prototype regression error.
How severe is CVE-2006-6507?: CVE-2006-6507 has a CVSS 2.0 base score of 4.3, rated medium severity.
Is CVE-2006-6507 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (74th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2006-6507?: CVE-2006-6507 affects Mozilla Firefox. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2006-6507?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2006-6507 published?: CVE-2006-6507 was published on 2006-12-20 and last updated on 2026-06-16.

References

Affected products (1)

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

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