{"id":82810,"date":"2026-07-31T23:13:15","date_gmt":"2026-07-31T19:43:15","guid":{"rendered":"https:\/\/afaghhosting.net\/blog\/cve-2026-53599-redaxo-has-a-mediapool-isallowedextension-bypass-via-multi-segment-filename-that-leads-to-authenticated-rce-on-apache-mod_php-multi-extension-handlers\/"},"modified":"2026-07-31T23:13:15","modified_gmt":"2026-07-31T19:43:15","slug":"cve-2026-53599-redaxo-has-a-mediapool-isallowedextension-bypass-via-multi-segment-filename-that-leads-to-authenticated-rce-on-apache-mod_php-multi-extension-handlers","status":"publish","type":"post","link":"https:\/\/afaghhosting.net\/blog\/cve-2026-53599-redaxo-has-a-mediapool-isallowedextension-bypass-via-multi-segment-filename-that-leads-to-authenticated-rce-on-apache-mod_php-multi-extension-handlers\/","title":{"rendered":"CVE-2026-53599 &#8211; Redaxo has a Mediapool isAllowedExtension bypass via multi-segment filename that leads to authenticated RCE on Apache mod_php multi-extension handlers"},"content":{"rendered":"<p>CVE ID :CVE-2026-53599<\/p>\n<p>  Published : July 31, 2026, 7:43 p.m. | 4\u00a0minutes ago<\/p>\n<p>  Description :REDAXO is a PHP-based content management system. From 5.18.2 until 5.21.1, rex_mediapool::isAllowedExtension in redaxo\/src\/addons\/mediapool\/lib\/mediapool.php lets an authenticated backend user with media[upload] permission upload a JPEG\/PHP polyglot named shell.php.any.jpg, which web servers with multi-extension PHP handlers can execute as the web-server user. This issue is fixed in version 5.21.1.<\/p>\n<p>  Severity: 0.0 | NA<\/p>\n<p>  Visit the link for more details, such as CVSS details, affected products, timeline, and more&#8230;\u00a0<\/p>\n","protected":false},"excerpt":{"rendered":"<p>CVE ID :CVE-2026-53599 Published : July 31, 2026, 7:43 p.m. | 4\u00a0minutes ago Description :REDAXO is a PHP-based content management system. From 5.18.2 until 5.21.1, rex_mediapool::isAllowedExtension in redaxo\/src\/addons\/mediapool\/lib\/mediapool.php lets an authenticated backend user with media[upload] permission upload a JPEG\/PHP polyglot named shell.php.any.jpg, which web servers with multi-extension PHP handlers can execute as the web-server user. &hellip;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[26],"tags":[],"class_list":["post-82810","post","type-post","status-publish","format-standard","hentry","category-vulnerability"],"_links":{"self":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/posts\/82810","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/comments?post=82810"}],"version-history":[{"count":0,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/posts\/82810\/revisions"}],"wp:attachment":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/media?parent=82810"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/categories?post=82810"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/tags?post=82810"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}