{"id":236942,"date":"2026-05-12T02:31:39","date_gmt":"2026-05-12T07:31:39","guid":{"rendered":"https:\/\/lifeboat.com\/blog\/2026\/05\/instructure-confirms-hackers-used-canvas-flaw-to-deface-portals"},"modified":"2026-05-12T02:31:39","modified_gmt":"2026-05-12T07:31:39","slug":"instructure-confirms-hackers-used-canvas-flaw-to-deface-portals","status":"publish","type":"post","link":"https:\/\/lifeboat.com\/blog\/2026\/05\/instructure-confirms-hackers-used-canvas-flaw-to-deface-portals","title":{"rendered":"Instructure confirms hackers used Canvas flaw to deface portals"},"content":{"rendered":"<p><a class=\"aligncenter blog-photo\" href=\"https:\/\/lifeboat.com\/blog.images\/instructure-confirms-hackers-used-canvas-flaw-to-deface-portals2.jpg\"><\/a><\/p>\n<p>Education technology giant Instructure has confirmed that a security vulnerability allowed hackers to modify Canvas login portals and leave an extortion message.<\/p>\n<p>BleepingComputer has learned that both the breach and defacements involved multiple cross-site scripting (XSS) vulnerabilities that enabled the attacker to obtain authenticated admin sessions.<\/p>\n<p>The second hack was to draw attention and to pressure Instructure into entering negotiations to pay a ransom following an initial breach <a href=\"https:\/\/www.bleepingcomputer.com\/news\/security\/edu-tech-firm-instructure-discloses-cyber-incident-probes-impact\/\" rel=\"nofollow noopener\">disclosed a week before<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Education technology giant Instructure has confirmed that a security vulnerability allowed hackers to modify Canvas login portals and leave an extortion message. BleepingComputer has learned that both the breach and defacements involved multiple cross-site scripting (XSS) vulnerabilities that enabled the attacker to obtain authenticated admin sessions. The second hack was to draw attention and to [\u2026]<\/p>\n","protected":false},"author":427,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[34,32],"tags":[],"class_list":["post-236942","post","type-post","status-publish","format-standard","hentry","category-cybercrime-malcode","category-education"],"_links":{"self":[{"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/posts\/236942","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/users\/427"}],"replies":[{"embeddable":true,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/comments?post=236942"}],"version-history":[{"count":0,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/posts\/236942\/revisions"}],"wp:attachment":[{"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/media?parent=236942"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/categories?post=236942"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/tags?post=236942"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}