action_public/search.php in Invision Power Board (IPB) 2.1.x and 2.0.x before 20060425 allows remote attackers to execute arbitrary PHP code via a search with a crafted value of the lastdate parameter, which alters the behavior of a regular expression to add a "#e" (execute) modifier.
Invision Power Board (IPB) 1.0 through 1.3 allows remote attackers to edit arbitrary forum posts via a direct request to index.php with modified parameters.
SQL injection vulnerability in lib/func_taskmanager.php in Invision Power Board (IPB) 2.1.x and 2.0.x before 20060425 allows remote attackers to execute arbitrary SQL commands via the ck parameter, which can inject at most 32 characters.