{"id":3109,"date":"2015-08-12T12:02:25","date_gmt":"2015-08-12T17:02:25","guid":{"rendered":"http:\/\/www.directoryone.com\/blog\/?p=3109"},"modified":"2025-07-01T10:24:17","modified_gmt":"2025-07-01T15:24:17","slug":"new-firefox-update-39-0-3-patches-major-vulnerability","status":"publish","type":"post","link":"https:\/\/www.directoryone.com\/blog\/new-firefox-update-39-0-3-patches-major-vulnerability.html","title":{"rendered":"New Firefox Update 39.0.3 Patches Major Vulnerability"},"content":{"rendered":"<p><a href=\"http:\/\/www.directoryone.com\/blog\/wp-content\/uploads\/4064851076_394f588099_z.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"alignright size-medium wp-image-3116\" src=\"http:\/\/www.directoryone.com\/blog\/wp-content\/uploads\/4064851076_394f588099_z-300x300.jpg\" alt=\"4064851076_394f588099_z\" width=\"300\" height=\"300\" srcset=\"https:\/\/www.directoryone.com\/blog\/wp-content\/uploads\/4064851076_394f588099_z-300x300.jpg 300w, https:\/\/www.directoryone.com\/blog\/wp-content\/uploads\/4064851076_394f588099_z-150x150.jpg 150w, https:\/\/www.directoryone.com\/blog\/wp-content\/uploads\/4064851076_394f588099_z.jpg 640w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/a><\/p>\n<p>Thursday, Mozilla released a <a href=\"https:\/\/support.mozilla.org\/en-US\/kb\/update-firefox-latest-version\" target=\"_blank\" rel=\"noopener noreferrer\">security patch<\/a> for a major vulnerability in the Firefox browser. The loophole allowed hackers to &#8220;search for and upload&#8221; documents from your hard drive to their servers. Mozilla is urging all Firefox users to upgrade to Firefox version 39.0.3. If you are using the Firefox Extended Support Release via school or business, you should upgrade to Firefox 38.1.1.<\/p>\n<p>Mozilla became aware of the issue when a Firefox user noticed &#8220;an advertisement on a news site in Russia was serving a Firefox exploit that searched for sensitive files and uploaded them to a server that appears to be in Ukraine.&#8221; <a href=\"https:\/\/blog.mozilla.org\/security\/2015\/08\/06\/firefox-exploit-found-in-the-wild\/\" target=\"_blank\" rel=\"noopener noreferrer\">According to Mozilla<\/a>, the vulnerability stems from an interaction between JavaScript&#8217;s context separation and Firefox&#8217;s PDF Viewer. Products not containing the PDF Viewer, such as Firefox for Android, are not at risk. Mozilla recommends changing any passwords or keys for Windows and Linux consumers using s3browser, Filezilla and Psi+.<\/p>\n<p>If you have any questions about network security call <a href=\"http:\/\/www.directoryone.com\/\" target=\"_blank\" rel=\"noopener noreferrer\">Directory One<\/a>, now offering\u00a0monthly IT services packages. Make sure all of your computers are protected, call now (713) 465-0051.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Thursday, Mozilla released a security patch for a major vulnerability in the Firefox browser. The loophole allowed hackers to &#8220;search for and upload&#8221; documents from your hard drive to their servers. Mozilla is urging all Firefox users to upgrade to Firefox version 39.0.3. If you are using the Firefox Extended Support Release via school or business, you should upgrade to Firefox 38.1.1. Mozilla became aware of the issue when a Firefox user noticed &#8220;an advertisement on a news site in Russia was serving a Firefox exploit that searched for sensitive files and uploaded them to a server that appears to be in Ukraine.&#8221; According to Mozilla, the vulnerability stems from an interaction between JavaScript&#8217;s context separation and Firefox&#8217;s PDF Viewer. Products not containing the PDF Viewer, such as Firefox for Android, are not at risk. Mozilla recommends changing any passwords or keys for Windows and Linux consumers using s3browser, Filezilla and Psi+. If you have any questions about network security call Directory One, now offering\u00a0monthly IT services packages. Make sure all of your computers are protected, call now (713) 465-0051.<\/p>\n","protected":false},"author":1,"featured_media":4656,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[13],"tags":[880,882,883,881,884],"class_list":["post-3109","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-search-engine-optimization","tag-firefox-39-0-3-update","tag-firefox-exploit-patch","tag-firefox-javascript-exploit","tag-firefox-security-vulnerability","tag-secure-web-browsing-firefox"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.2 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Firefox 39.0.3 Update Fixes Major Security Vulnerability<\/title>\n<meta name=\"description\" content=\"Mozilla releases Firefox 39.0.3 to patch a serious JavaScript exploit. Learn how this update improves browser security and protects user data.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.directoryone.com\/blog\/new-firefox-update-39-0-3-patches-major-vulnerability.html\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Firefox 39.0.3 Update Fixes Major Security Vulnerability\" \/>\n<meta property=\"og:description\" content=\"Mozilla releases Firefox 39.0.3 to patch a serious JavaScript exploit. Learn how this update improves browser security and protects user data.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.directoryone.com\/blog\/new-firefox-update-39-0-3-patches-major-vulnerability.html\" \/>\n<meta property=\"og:site_name\" content=\"Search Engine Marketing &amp; Optimization Blog\" \/>\n<meta property=\"article:published_time\" content=\"2015-08-12T17:02:25+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2025-07-01T15:24:17+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.directoryone.com\/blog\/wp-content\/uploads\/download.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"300\" \/>\n\t<meta property=\"og:image:height\" content=\"168\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"Directory One\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Directory One\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 minute\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/www.directoryone.com\/blog\/new-firefox-update-39-0-3-patches-major-vulnerability.html#article\",\"isPartOf\":{\"@id\":\"https:\/\/www.directoryone.com\/blog\/new-firefox-update-39-0-3-patches-major-vulnerability.html\"},\"author\":{\"name\":\"Directory One\",\"@id\":\"https:\/\/www.directoryone.com\/blog\/#\/schema\/person\/72b06653ae945412b7e913abee89833c\"},\"headline\":\"New Firefox Update 39.0.3 Patches Major Vulnerability\",\"datePublished\":\"2015-08-12T17:02:25+00:00\",\"dateModified\":\"2025-07-01T15:24:17+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/www.directoryone.com\/blog\/new-firefox-update-39-0-3-patches-major-vulnerability.html\"},\"wordCount\":185,\"image\":{\"@id\":\"https:\/\/www.directoryone.com\/blog\/new-firefox-update-39-0-3-patches-major-vulnerability.html#primaryimage\"},\"thumbnailUrl\":\"https:\/\/www.directoryone.com\/blog\/wp-content\/uploads\/download.jpg\",\"keywords\":[\"Firefox 39.0.3 update\",\"Firefox exploit patch\",\"Firefox JavaScript exploit\",\"Firefox security vulnerability\",\"secure web browsing Firefox\"],\"articleSection\":[\"Search Engine Optimization | SEO\"],\"inLanguage\":\"en-US\"},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.directoryone.com\/blog\/new-firefox-update-39-0-3-patches-major-vulnerability.html\",\"url\":\"https:\/\/www.directoryone.com\/blog\/new-firefox-update-39-0-3-patches-major-vulnerability.html\",\"name\":\"Firefox 39.0.3 Update Fixes Major Security Vulnerability\",\"isPartOf\":{\"@id\":\"https:\/\/www.directoryone.com\/blog\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\/\/www.directoryone.com\/blog\/new-firefox-update-39-0-3-patches-major-vulnerability.html#primaryimage\"},\"image\":{\"@id\":\"https:\/\/www.directoryone.com\/blog\/new-firefox-update-39-0-3-patches-major-vulnerability.html#primaryimage\"},\"thumbnailUrl\":\"https:\/\/www.directoryone.com\/blog\/wp-content\/uploads\/download.jpg\",\"datePublished\":\"2015-08-12T17:02:25+00:00\",\"dateModified\":\"2025-07-01T15:24:17+00:00\",\"author\":{\"@id\":\"https:\/\/www.directoryone.com\/blog\/#\/schema\/person\/72b06653ae945412b7e913abee89833c\"},\"description\":\"Mozilla releases Firefox 39.0.3 to patch a serious JavaScript exploit. 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