CVE-2005-3416

CVE-2005-3416 is a high-severity vulnerability in Phpbb Group Phpbb with a CVSS 2.0 base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Description

phpBB 2.0.17 and earlier, when register_globals is enabled and the session_start function has not been called to handle a session, allows remote attackers to bypass security checks by setting the $_SESSION and $HTTP_SESSION_VARS variables to strings instead of arrays, which causes an array_merge function call to fail.

Frequently asked questions

What is CVE-2005-3416?
phpBB 2.0.17 and earlier, when register_globals is enabled and the session_start function has not been called to handle a session, allows remote attackers to bypass security checks by setting the $_SESSION and $HTTP_SESSION_VARS variables to strings instead of arrays, which causes an array_merge function call to fail.
How severe is CVE-2005-3416?
CVE-2005-3416 has a CVSS 2.0 base score of 7.5, rated high severity.
Is CVE-2005-3416 being actively exploited?
It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (81st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2005-3416?
CVE-2005-3416 primarily affects Phpbb Group Phpbb. In total, 27 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2005-3416?
Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2005-3416 published?
CVE-2005-3416 was published on 2005-11-01 and last updated on 2026-06-16.

References

Affected products (27)

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