How severe is CVE-2008-2638?

CVE-2008-2638 has a CVSS 2.0 base score of 10.0, rated critical severity.

Is CVE-2008-2638 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (89th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2008-2638?

CVE-2008-2638 affects 1-script 1-book. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2008-2638?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2008-2638 published?

CVE-2008-2638 was published on 2008-06-10 and last updated on 2026-06-16.

CVE-2008-2638

CVE-2008-2638 is a critical-severity vulnerability in 1-script 1-book with a CVSS 2.0 base score of 10.0. 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-94.

Key facts

Severity: Critical (CVSS 2.0 base score 10.0)
EPSS exploit prediction: 4% (89th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-94
Affected product: 1-script 1-book
Published: 2008-06-10
Last modified: 2026-06-16

Description

Static code injection vulnerability in guestbook.php in 1Book 1.0.1 and earlier allows remote attackers to upload arbitrary PHP code via the message parameter in an HTML webform, which is written to data.php.

Frequently asked questions

What is CVE-2008-2638?: Static code injection vulnerability in guestbook.php in 1Book 1.0.1 and earlier allows remote attackers to upload arbitrary PHP code via the message parameter in an HTML webform, which is written to data.php.
How severe is CVE-2008-2638?: CVE-2008-2638 has a CVSS 2.0 base score of 10.0, rated critical severity.
Is CVE-2008-2638 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (89th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2008-2638?: CVE-2008-2638 affects 1-script 1-book. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2008-2638?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2008-2638 published?: CVE-2008-2638 was published on 2008-06-10 and last updated on 2026-06-16.

References

Affected products (1)

cpe:2.3:a:1-script:1-book:*:*:*:*:*:*:*:*

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