{"id":53865,"date":"2026-05-12T17:39:46","date_gmt":"2026-05-12T17:39:46","guid":{"rendered":"https:\/\/zero.redgem.net\/?p=53865"},"modified":"2026-05-12T17:39:46","modified_gmt":"2026-05-12T17:39:46","slug":"efw4x-stored-xss-via-previewservlet","status":"publish","type":"post","link":"https:\/\/zero.redgem.net\/?p=53865","title":{"rendered":"efw4.X: Stored XSS via previewServlet_CVE-2026-44259"},"content":{"rendered":"<p>{&#8220;lastseen&#8221;:&#8221;&#8221;,&#8221;description&#8221;:&#8221;efw4.X is an Enterprise Framework for Web. Prior to 4.08.010, the previewServlet serves files with their detected MIME type based on file extension, without any content sanitization or security headers. Files with .html, .htm, or .svg extensions are served as text\/html or image\/svg+xml respectively, causing any embedded JavaScript to execute in the victim&#8217;s browser within the application&#8217;s origin. 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Prior to 4.08.010, the previewServlet serves files with their detected MIME type based on file extension, without any&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2],"tags":[6,8,67,12,21,13,7,11,5],"class_list":["post-53865","post","type-post","status-publish","format-standard","hentry","category-category_cve","tag-cve","tag-cvss","tag-cvss-46","tag-exploit","tag-medium","tag-news","tag-security","tag-tapic","tag-vulnerability"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>efw4.X: Stored XSS via previewServlet_CVE-2026-44259 - zero redgem<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/zero.redgem.net\/?p=53865\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"efw4.X: Stored XSS via previewServlet_CVE-2026-44259 - zero redgem\" \/>\n<meta property=\"og:description\" content=\"{&#8220;lastseen&#8221;:&#8221;&#8221;,&#8221;description&#8221;:&#8221;efw4.X is an Enterprise Framework for Web. 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