CVE-2025-54597 Cross-site scripting in Heimdall
Attackers can execute arbitrary scripts in user browsers via the q parameter in Heimdall, potentially leading to session hijacking or data theft.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-54597?
CVE-2025-54597 is a high-severity cross-site scripting vulnerability in LinuxServer Heimdall, published on 27 Jul 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
LinuxServer.io Heimdall before 2.7.3 allows XSS via the q parameter.
Weakness: CWE-79
Which versions are affected by CVE-2025-54597?
It affects 1 product.
Products include Linuxserver Heimdall Application Dashboard.
How do I fix CVE-2025-54597?
No fix has been published for CVE-2025-54597 yet. Limit exposure of the affected software until one is available.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2025-54597 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-54597 exists.
Public exploit code: 1 Nuclei template.
Other vulnerabilities in LinuxServer Heimdall
Sources
Also known as GHSA-3x9c-53jf-h89x.