{"id":3547,"date":"2026-03-26T13:11:00","date_gmt":"2026-03-26T13:11:00","guid":{"rendered":"https:\/\/infosec-daily.com\/?page_id=3547"},"modified":"2026-03-26T13:11:00","modified_gmt":"2026-03-26T13:11:00","slug":"claude-extension-flaw-enabled-zero-click-xss-prompt-injection-via-any-website","status":"publish","type":"page","link":"https:\/\/infosec-daily.com\/?page_id=3547","title":{"rendered":"Claude Extension Flaw Enabled Zero-Click XSS Prompt Injection via Any Website"},"content":{"rendered":"<p>Cybersecurity researchers have disclosed a vulnerability in Anthropic&#8217;s Claude Google Chrome Extension that could have been exploited to trigger malicious prompts simply by visiting a web page.<br \/>\nThe flaw &#8220;allowed any website to silently inject prompts into that assistant as if the user wrote them,&#8221; Koi Security researcher Oren Yomtov said in a report shared with The Hacker News. &#8220;No clicks, no<\/p>","protected":false},"excerpt":{"rendered":"<p>Cybersecurity researchers have disclosed a vulnerability in Anthropic&#8217;s Claude Google Chrome Extension that could have been exploited to trigger malicious prompts simply by visiting a web page. The flaw &#8220;allowed&hellip;<\/p>\n","protected":false},"author":1,"featured_media":3548,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"saved_in_kubio":false,"footnotes":""},"class_list":["post-3547","page","type-page","status-publish","has-post-thumbnail","hentry"],"kubio_ai_page_context":{"short_desc":"","purpose":"general"},"_links":{"self":[{"href":"https:\/\/infosec-daily.com\/index.php?rest_route=\/wp\/v2\/pages\/3547","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/infosec-daily.com\/index.php?rest_route=\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/infosec-daily.com\/index.php?rest_route=\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/infosec-daily.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/infosec-daily.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=3547"}],"version-history":[{"count":0,"href":"https:\/\/infosec-daily.com\/index.php?rest_route=\/wp\/v2\/pages\/3547\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/infosec-daily.com\/index.php?rest_route=\/wp\/v2\/media\/3548"}],"wp:attachment":[{"href":"https:\/\/infosec-daily.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=3547"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}