How severe is CVE-2006-6839?

CVE-2006-6839 has a CVSS 2.0 base score of 10.0, rated critical severity.

Is CVE-2006-6839 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (72nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2006-6839?

CVE-2006-6839 primarily affects Phpbb Group Phpbb. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2006-6839?

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-2006-6839 published?

CVE-2006-6839 was published on 2006-12-31 and last updated on 2026-06-16.

CVE-2006-6839

CVE-2006-6839 is a critical-severity vulnerability in Phpbb Group Phpbb 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.

Key facts

Severity: Critical (CVSS 2.0 base score 10.0)
EPSS exploit prediction: 2% (72nd percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Phpbb Group Phpbb
Published: 2006-12-31
Last modified: 2026-06-16

Description

Unspecified vulnerability in phpBB before 2.0.22 has unknown impact and remote attack vectors related to "criteria for 'bad' redirection targets."

Frequently asked questions

What is CVE-2006-6839?: Unspecified vulnerability in phpBB before 2.0.22 has unknown impact and remote attack vectors related to "criteria for 'bad' redirection targets."
How severe is CVE-2006-6839?: CVE-2006-6839 has a CVSS 2.0 base score of 10.0, rated critical severity.
Is CVE-2006-6839 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (72nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2006-6839?: CVE-2006-6839 primarily affects Phpbb Group Phpbb. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2006-6839?: 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-2006-6839 published?: CVE-2006-6839 was published on 2006-12-31 and last updated on 2026-06-16.

References

Affected products (4)

cpe:2.3:a:phpbb_group:phpbb:1.2.4_rc3:*:*:*:*:*:*:*
cpe:2.3:a:phpbb_group:phpbb:2.0.18:*:*:*:*:*:*:*
cpe:2.3:a:phpbb_group:phpbb:2.0.20:*:*:*:*:*:*:*
cpe:2.3:a:phpbb_group:phpbb:2.0.21:*:*:*:*:*:*:*

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