CVE-2026-25748
HighSummary
Podatność w authentik, otwartoźródłowym dostawcy tożsamości, pozwalała na ominięcie uwierzytelnienia przy użyciu źle sformatowanego ciasteczka w Proxy Provider, gdy był używany z Traefik lub Caddy jako odwrotnym proxy. W przypadku użycia złośliwego ciasteczka, nagłówki specyficzne dla authentik nie były ustawiane, co mogło umożliwić atakującemu dostęp do aplikacji.
Risk Assessment
Organizacje korzystające z authentik w połączeniu z Traefik lub Caddy mogą być narażone na nieautoryzowany dostęp do swoich aplikacji, co stwarza poważne zagrożenie dla bezpieczeństwa danych.
Recommendation
Zaleca się aktualizację do wersji 2025.10.4 lub 2025.12.4, które naprawiają tę podatność, aby zabezpieczyć system przed potencjalnymi atakami.
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The vulnerability is a local privilege escalation due to insecure file permissions. It affects Acronis Backup plugin for cPanel & WHM (Linux) before build 1.9.3.1021, Acronis Backup extension for Plesk (Linux) before build 1.8.11.638, and Acronis Backup plugin for DirectAdmin (Linux) before build 1.2.3.238.
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Original NVD description (English source)
authentik is an open-source identity provider. Prior to 2025.10.4 and 2025.12.4, with a malformed cookie it was possible to bypass authentication when using forward authentication in the authentik Proxy Provider when used in conjunction with Traefik or Caddy as reverse proxy. When a malicious cookie was used, none of the authentik-specific X-Authentik-* headers were set which depending on application can grant access to an attacker. authentik 2025.10.4 and 2025.12.4 fix this issue.

