CVE-2026-33868mediumCWE-601

CVE-2026-33868: falha de média gravidade em mastodon

Mastodon has a GET-Based Open Redirect via '/web/%2F<domain>'

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28Vexday Risk Score

Corrija em breve. Ela tem exploit funcional público.

ssvc Attendcvss 4.3epss 0.5%
Mastodon is a free, open-source social network server based on ActivityPub. Prior to versions 4.5.8, 4.4.15, and 4.3.21, an unauthenticated Open Redirect vulnerability (CWE-601) exists in the `/web/*` route due to improper handling of URL-encoded path segments. An attacker can craft a specially encoded URL that causes the application to redirect users to an arbitrary external domain, enabling phishing attacks and potential OAuth credential theft. The issue occurs because URL-encoded slashes (`%2F`) bypass Rails path normalization and are interpreted as host-relative redirects. Versions 4.5.8, 4.4.15, and 4.3.21 patch the issue.
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
Produtos afetados
mastodon · mastodon
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