🛡️ CVE-2025-50578
🔴 CVSS 9.8 — Critical ⚠️ Exploit Public CWE-20 NVD
9.8
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

LinuxServer.io heimdall 2.6.3-ls307 contains a vulnerability in how it handles user-supplied HTTP headers, specifically `X-Forwarded-Host` and `Referer`. An unauthenticated remote attacker can manipulate these headers to perform Host Header Injection and Open Redirect attacks. This allows the loading of external resources from attacker-controlled domains and unintended redirection of users, potentially enabling phishing, UI redress, and session theft. The vulnerability exists due to insufficient validation and trust of untrusted input, affecting the integrity and trustworthiness of the application.

Details

Severity CRITICAL
CVSS Score 9.8
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CWE CWE-20
Public Exploit ⚠️ Yes
Source NVD
Published 2025-07-30
Updated 2026-06-02
Modified 2025-08-25
Fix URL N/A

Affected Packages

Software From version Fixed in
docker-heimdall — —

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