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In Traefik before versions 1.7.26, 2.2.8, and 2.3.0-rc3, there exists a potential open redirect vulnerability in Traefik's handling of the "X-Forwarded-Prefix" header. The Traefik API dashboard component doesn't validate that the value of the header "X-Forwarded-Prefix" is a site relative path and will redirect to any header provided URI. Successful exploitation of an open redirect can be used to entice victims to disclose sensitive information. Active Exploitation of this issue is unlikely as it would require active header injection, however the Traefik team addressed this issue nonetheless to prevent abuse in e.g. cache poisoning scenarios.

In Traefik before versions 1.7.26, 2.2.8, and 2.3.0-rc3, there exists ...

Traefik vulnerable to Open Redirect via handling of X-Forwarded-Prefix header

ALT-PU-2019-2819: package `traefik` update to version 2.0.1-alt1