--- title: Attackers abuse OAuth’s built-in redirects to launch... description: Attackers are exploiting OAuth's built-in error redirect mechanism to route victims from legitimate Microsoft or Google login URLs to phishing sites or malware... canonical: https://daily.dev/posts/attackers-abuse-oauth-s-built-in-redirects-to-launch-phishing-and-malware-attacks-hurtq3vaq twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Attackers abuse OAuth’s built-in redirects to launch phishing and malware attacks | daily.dev og:description: Attackers are exploiting OAuth's built-in error redirect mechanism to route victims from legitimate Microsoft or Google login URLs to phishing sites or malware... og:url: https://daily.dev/posts/attackers-abuse-oauth-s-built-in-redirects-to-launch-phishing-and-malware-attacks-hurtq3vaq og:image: https://api.daily.dev/og/posts/HUrTq3vAq.png og:image:alt: Attackers abuse OAuth’s built-in redirects to launch phishing and malware attacks og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # Attackers abuse OAuth’s built-in redirects to launch phishing and malware attacks **[Security Boulevard](https://daily.dev/sources/securityboulevard)** · 5 min read · 0 upvotes · 0 comments ## Summary Attackers are exploiting OAuth's built-in error redirect mechanism to route victims from legitimate Microsoft or Google login URLs to phishing sites or malware downloads — without needing to steal tokens. The attack uses silent OAuth flows with intentionally invalid parameters (e.g., prompt=none, invalid scope), causing the identity provider to return an error and redirect the browser to an attacker-controlled URI. From the user's perspective, it appears as a brief flash of a trusted login URL before landing on a malicious page. Two variants exist: an Attacker-in-the-Middle phishing kit that intercepts credentials and MFA tokens, and a malware delivery variant that auto-downloads a payload. Defensive tips include scrutinizing long OAuth URLs in emails, not clicking unexpected login prompts, and keeping security tools updated. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Similar posts on daily.dev - [When checking the URL isn't enough: phishing via the Microsoft identity platform](https://daily.dev/posts/when-checking-the-url-isn-t-enough-phishing-via-the-microsoft-identity-platform-wtxnir48k) · Securelist · 0 upvotes · 0 comments - [We Need to Talk About Device Code Phishing](https://daily.dev/posts/we-need-to-talk-about-device-code-phishing-x88bpk5tq) · Huntress Blog · 0 upvotes · 0 comments - [New phishing campaign tricks employees into bypassing Microsoft 365 MFA](https://daily.dev/posts/new-phishing-campaign-tricks-employees-into-bypassing-microsoft-365-mfa-2reed6azp) · CSO Online · 0 upvotes · 0 comments - [The Art of Breaking OAuth: Real-World Exploit and Misuses](https://daily.dev/posts/the-art-of-breaking-oauth-real-world-exploit-and-misuses-hznv1zdix) · InfoSec Write-ups · 2 upvotes · 0 comments --- Tags: [#security](https://daily.dev/tags/security), [#malware](https://daily.dev/tags/malware), [#phishing](https://daily.dev/tags/phishing), [#oauth](https://daily.dev/tags/oauth), [#iam](https://daily.dev/tags/iam) [View this post on daily.dev](https://daily.dev/posts/attackers-abuse-oauth-s-built-in-redirects-to-launch-phishing-and-malware-attacks-hurtq3vaq) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"TechArticle","headline":"Attackers abuse OAuth’s built-in redirects to launch phishing and malware attacks","url":"https://daily.dev/posts/attackers-abuse-oauth-s-built-in-redirects-to-launch-phishing-and-malware-attacks-hurtq3vaq","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/attackers-abuse-oauth-s-built-in-redirects-to-launch-phishing-and-malware-attacks-hurtq3vaq"},"datePublished":"2026-03-04T13:41:19.229Z","dateModified":"2026-03-04T13:42:07.779Z","description":"Attackers are exploiting OAuth's built-in error redirect mechanism to route victims from legitimate Microsoft or Google login URLs to phishing sites or malware...","image":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/8fe9eeb967de205fd6743e2535f16178?_a=AQAEuop","thumbnailUrl":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/8fe9eeb967de205fd6743e2535f16178?_a=AQAEuop","isAccessibleForFree":true,"articleSection":"Security Boulevard","inLanguage":"en","publisher":{"@type":"Organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180}},"author":{"@type":"Organization","name":"Security Boulevard","logo":"https://media.daily.dev/image/upload/t_logo,f_auto/v1/logos/3613c832180040de8d85bb29f74395be","url":"https://daily.dev/sources/securityboulevard"},"commentCount":0,"discussionUrl":"https://daily.dev/posts/attackers-abuse-oauth-s-built-in-redirects-to-launch-phishing-and-malware-attacks-hurtq3vaq","interactionStatistic":[{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":0},{"@type":"InteractionCounter","interactionType":{"@type":"CommentAction"},"userInteractionCount":0}],"keywords":"security,malware,phishing,oauth,iam","timeRequired":"PT5M"} {"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https://daily.dev"},{"@type":"ListItem","position":2,"name":"Security Boulevard","item":"https://daily.dev/sources/securityboulevard"},{"@type":"ListItem","position":3,"name":"Attackers abuse OAuth’s built-in redirects to launch phishing and malware attacks"}]} ```