How severe is CVE-2006-6764?

CVE-2006-6764 has a CVSS 2.0 base score of 6.8, rated medium severity.

Is CVE-2006-6764 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (79th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2006-6764?

CVE-2006-6764 primarily affects Keep It Simple Guest Book. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2006-6764?

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

When was CVE-2006-6764 published?

CVE-2006-6764 was published on 2006-12-27 and last updated on 2026-06-16.

CVE-2006-6764

CVE-2006-6764 is a medium-severity vulnerability in Keep It Simple Guest Book with a CVSS 2.0 base score of 6.8. 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 6.8)
EPSS exploit prediction: 2% (79th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Keep It Simple Guest Book
Published: 2006-12-27
Last modified: 2026-06-16

Description

PHP remote file inclusion vulnerability in authenticate.php in Keep It Simple Guest Book (KISGB), when executing PHP through CGI, allows remote attackers to execute arbitrary PHP code via a URL in the default_path_to_themes parameter.

Frequently asked questions

What is CVE-2006-6764?: PHP remote file inclusion vulnerability in authenticate.php in Keep It Simple Guest Book (KISGB), when executing PHP through CGI, allows remote attackers to execute arbitrary PHP code via a URL in the default_path_to_themes parameter.
How severe is CVE-2006-6764?: CVE-2006-6764 has a CVSS 2.0 base score of 6.8, rated medium severity.
Is CVE-2006-6764 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (79th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2006-6764?: CVE-2006-6764 primarily affects Keep It Simple Guest Book. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2006-6764?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2006-6764 published?: CVE-2006-6764 was published on 2006-12-27 and last updated on 2026-06-16.

References

Affected products (2)

cpe:2.3:a:keep_it_simple_guest_book:keep_it_simple_guest_book:*:*:*:*:*:*:*:*
cpe:2.3:a:keep_it_simple_guest_book:keep_it_simple_guest_book:5.0:*:*:*:*:*:*:*

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CVE-2006-6763 — High (CVSS 7.5): Multiple PHP remote file inclusion vulnerabilities in the Keep It Simple Guest Book (KISGB) allow remote attackers to…

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