Linuxserver: Security Vulnerabilities
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.
CVSS Score
9.8
EPSS Score
0.002
Published
2025-07-30
LinuxServer.io Heimdall before 2.7.3 allows XSS via the q parameter.
CVSS Score
7.2
EPSS Score
0.0
Published
2025-07-27
Heimdall Application Dashboard through 2.5.4 allows reflected and stored XSS via "Application name" to the "Add application" page. The stored XSS will be triggered in the "Application list" page.
CVSS Score
5.4
EPSS Score
0.001
Published
2022-12-27