prefs.php in phpBB 1.4.0 and earlier allows remote authenticated users to execute arbitrary PHP code via an invalid language value, which prevents the variables (1) $l_statsblock in prefs.php or (2) $l_privnotify in auth.php from being properly initialized, which can be modified by the user and later used in an eval statement.

References

• https://nvd.nist.gov/vuln/detail/CVE-2001-1471
• https://exchange.xforce.ibmcloud.com/vulnerabilities/6944
• http://archives.neohapsis.com/archives/bugtraq/2001-08/0123.html
• http://www.derkeiler.com/Mailing-Lists/securityfocus/bugtraq/2001-08/0087.html
• http://www.kb.cert.org/vuls/id/920931
• http://www.securityfocus.com/bid/3167