{"id":15210,"date":"2026-09-04T19:02:30","date_gmt":"2026-09-04T11:02:30","guid":{"rendered":"https:\/\/www.54iter.cn\/?vuln=cve-2026-53593"},"modified":"2026-09-04T19:02:30","modified_gmt":"2026-09-04T11:02:30","slug":"cve-2026-53593","status":"publish","type":"vuln","link":"https:\/\/www.54iter.cn\/?vuln=cve-2026-53593","title":{"rendered":"CVE-2026-53593 [HIGH] &#8211; FreeScout is a free help desk and shared inbox built with PHP&#8217;s Laravel framework. Prior t"},"content":{"rendered":"<p>FreeScout is a free help desk and shared inbox built with PHP&#8217;s Laravel framework. Prior to version 1.8.224, the denylist that neutralizes dangerous file uploads (`Helper::$restricted_extensions`) is incomplete: it does not cover the `.pht` extension. The authenticated upload endpoint `POST \/uploads\/upload` (`SecureController@upload`) stores files with their original extension into the web-accessible directory `storage\/app\/public\/uploads\/` (served at `\/storage\/uploads\/`). On the standard Apache + `libapache2-mod-php` deployment, the default handler &#8220; executes `.pht`, so **any authenticated agent can upload a `.pht` web shell and run arbitrary commands as the web-server user** (`www-data`). This is a direct bypass of the fix for CVE-2025-48471, which added `phtml`\/`phar` but not `pht` (nor `phtm`, `phps`). Version 1.8.224 contains an updated fix.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>FreeScout is a free help desk and shared inbox built with PHP&#8217;s Laravel framework. Prior to version 1.8.224, the denylist that neutralizes dangerous file uploads (`Helper::$restricted_extensions`) is <\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-15210","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/15210","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln"}],"about":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/types\/vuln"}],"wp:attachment":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=15210"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=15210"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=15210"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}