The search function in phpBB 2.x provides a search_id value that leaks the state of PHP's PRNG, which allows remote attackers to obtain potentially sensitive information, as demonstrated by a cross-application attack against WordPress, a different vulnerability than CVE-2006-0632.

The gen_rand_string function in phpBB 2.0.19 uses insufficiently random data (small value space) to create the activation key ("validation ID") that is sent by e-mail when establishing a password, which makes it easier for remote attackers to obtain the key and modify passwords for existing accounts or create new accounts.