How severe is CVE-2008-4304?

CVE-2008-4304 has a CVSS 2.0 base score of 10.0, rated critical severity.

Is CVE-2008-4304 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-2008-4304?

CVE-2008-4304 primarily affects Phpcollab. In total, 7 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2008-4304?

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-2008-4304 published?

CVE-2008-4304 was published on 2008-12-23 and last updated on 2026-06-16.

CVE-2008-4304

CVE-2008-4304 is a critical-severity vulnerability in Phpcollab 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-78.

Key facts

Severity: Critical (CVSS 2.0 base score 10.0)
EPSS exploit prediction: 3% (86th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-78
Affected product: Phpcollab
Published: 2008-12-23
Last modified: 2026-06-16

Description

general/login.php in phpCollab 2.5 rc3 and earlier allows remote attackers to execute arbitrary commands via shell metacharacters in unspecified input related to the SSL_CLIENT_CERT environment variable. NOTE: in some environments, SSL_CLIENT_CERT always has a base64-encoded string value, which may impose constraints on injection for typical shells.

Frequently asked questions

What is CVE-2008-4304?: general/login.php in phpCollab 2.5 rc3 and earlier allows remote attackers to execute arbitrary commands via shell metacharacters in unspecified input related to the SSL_CLIENT_CERT environment variable. NOTE: in some environments, SSL_CLIENT_CERT always has a base64-encoded string value, which may impose constraints on injection for typical shells.
How severe is CVE-2008-4304?: CVE-2008-4304 has a CVSS 2.0 base score of 10.0, rated critical severity.
Is CVE-2008-4304 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-2008-4304?: CVE-2008-4304 primarily affects Phpcollab. In total, 7 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2008-4304?: 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-2008-4304 published?: CVE-2008-4304 was published on 2008-12-23 and last updated on 2026-06-16.

References

Affected products (7)

cpe:2.3:a:phpcollab:phpcollab:*:rc3:*:*:*:*:*:*
cpe:2.3:a:phpcollab:phpcollab:2.2:*:*:*:*:*:*:*
cpe:2.3:a:phpcollab:phpcollab:2.3:*:*:*:*:*:*:*
cpe:2.3:a:phpcollab:phpcollab:2.4:*:*:*:*:*:*:*
cpe:2.3:a:phpcollab:phpcollab:2.5:beta_4:*:*:*:*:*:*
cpe:2.3:a:phpcollab:phpcollab:2.5:rc1:*:*:*:*:*:*
cpe:2.3:a:phpcollab:phpcollab:2.5:rc2:*:*:*:*:*:*

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