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.
Exploitability
AV:NAC:LAu:NImpact
C:NI:PA:N5/AV:N/AC:L/Au:N/C:N/I:P/A:N