{"description":"Trending threats, MITRE ATT\u0026CK coverage, and detection metadata. Fed continuously.","favicon":"https://feed.craftedsignal.io/favicon-32x32.png","feed_url":"https://feed.craftedsignal.io/products/umbraco-cms--17.7.2/feed.json","home_page_url":"https://feed.craftedsignal.io/","icon":"https://feed.craftedsignal.io/apple-touch-icon.png","items":[{"_cs_actors":[],"_cs_cpes":["cpe:2.3:a:umbraco:cms:*:*:*:*:*:*:*:*"],"_cs_cves":[{"cvss":7.5,"id":"CVE-2026-117553"}],"_cs_exploited":false,"_cs_has_poc":false,"_cs_poc_references":[],"_cs_products":["Umbraco CMS (\u003c 17.7.2)","Umbraco CMS (\u003c 18.2.2)"],"_cs_severities":["high"],"_cs_tags":[],"_cs_type":"advisory","_cs_vendors":["Umbraco"],"content_html":"\u003cp\u003eUmbraco CMS versions before 17.7.2 and 18.2.2 contain an authentication bypass vulnerability. Unauthenticated attackers can poison the Host header to register attacker-controlled OAuth redirect URIs. By sending authorization links using \u003ccode\u003eresponse_mode=form_post\u003c/code\u003e to signed-in users, attackers can capture authorization codes. These codes can be redeemed via HTTP Basic client credentials to hijack back-office sessions and execute code through Razor templates.\u003c/p\u003e\n","date_modified":"2026-10-27T15:49:43Z","date_published":"2026-10-27T15:49:43Z","id":"https://feed.craftedsignal.io/briefs/2026-10-umbraco-auth-bypass/","summary":"Umbraco CMS contains an authentication bypass vulnerability involving Host header poisoning that allows unauthenticated attackers to hijack back-office sessions and execute code via Razor templates.","title":"Umbraco CMS: Authentication bypass (CVE-2026-117553)","url":"https://feed.craftedsignal.io/briefs/2026-10-umbraco-auth-bypass/"}],"language":"en","title":"CraftedSignal Threat Feed - Umbraco CMS (\u003c 17.7.2)","version":"https://jsonfeed.org/version/1.1"}