CVE-2005-3420
HighSummary
Vulnerability in usercp_register.php in phpBB 2.0.17 allows remote attackers to modify regular expressions and execute PHP code via the signature_bbcode_uid parameter by injecting an 'e' modifier into a preg_replace statement.
Risk Assessment
The risk for the organization is the possibility of remote arbitrary PHP code execution on the server, which can lead to full system compromise and access to sensitive data.
Recommendation
Immediately update phpBB to the latest available version that fixes this vulnerability. If an update is not possible, apply available security patches or temporarily disable the signature editing feature.
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Original NVD description (English source)
usercp_register.php in phpBB 2.0.17 allows remote attackers to modify regular expressions and execute PHP code via the signature_bbcode_uid parameter, as demonstrated by injecting an "e" modifier into a preg_replace statement.