Invision Power Board (IPB) 2.1.4 and earlier allows remote attackers to list directory contents via a direct request to multiple directories, including (1) sources/loginauth/convert/, (2) sources/portal_plugins/, (3) cache/skin_cache/cacheid_2/, (4) ips_kernel/PEAR/, (5) ips_kernel/PEAR/Text/, (6) ips_kernel/PEAR/Text/Diff/, (7) ips_kernel/PEAR/Text/Diff/Renderer/, (8) style_images/1/folder_rte_files/, (9) style_images/1/folder_js_skin/, (10) style_images/1/folder_rte_images/, and (11) upgrade/ and its subdirectories.