CVE-2025-50578

Published Jul 30, 2025 CVSS 3.1 · 9.8 Critical EPSS 3.1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
EUVD EUVD EUVD-2025-23174 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.
History
Type Values Removed Values Added
First Time appeared Linuxserver docker-heimdall
CPEs cpe:2.3:a:linuxserver:heimdall_application_dashboard:2.6.3-ls307:*:*:*:*:*:*:* cpe:2.3:a:linuxserver:docker-heimdall:2.6.3-ls307:*:*:*:*:*:*:*
Vendors & Products Linuxserver heimdall Application Dashboard
Linuxserver docker-heimdall
Type Values Removed Values Added
First Time appeared Linuxserver heimdall Application Dashboard
CPEs cpe:2.3:a:linuxserver:heimdall_application_dashboard:2.6.3-ls307:*:*:*:*:*:*:*
Vendors & Products Linuxserver heimdall Application Dashboard
Type Values Removed Values Added
First Time appeared Linuxserver
Linuxserver heimdall
Vendors & Products Linuxserver
Linuxserver heimdall
Type Values Removed Values Added
Weaknesses CWE-20
CWE-601
CWE-74
Metrics cvssV3_1

{'score': 9.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'}

ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'poc', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
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.
References
Weaknesses

Sources

Status
PUBLISHED
Assigner
mitre
Published
Updated
Jul 30, 2025, 3:43 PM
Reserved
Jun 16, 2025, 12:00 AM
Status
Analyzed
Published
Jul 30, 2025, 4:15 PM
Modified
Jun 17, 2026, 9:35 AM