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Vulnerabilities

Vulnerability · CVE-2025-54597

LinuxServer.io Heimdall before 2.7.3 allows XSS via the q parameter.

Published Jul 27, 2025 · catalog updated Jul 28, 2025 · LinuxServer Heimdall

Last checked Oct 23, 2026. A connected source was read within the last 7 days.

Check if you run it

No confirmed exploitation is on record for CVE-2025-54597. EPSS is 0.59%. Act only if a listed version of LinuxServer Heimdall is installed.

Gaps on this record

  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
High7.2
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.59%
Remediation
Version ranges on file
Affected products
vendor LinuxServer Heimdall 0 <2.7.3

LinuxServer.io Heimdall before 2.7.3 allows XSS via the q parameter.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • vendor LinuxServer Heimdall 0 <2.7.30 <2.7.3

How to fix CVE-2025-54597

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2025-54597. EPSS is 0.59%. Act only if a listed version of LinuxServer Heimdall is installed.

Which versions are affected?

Compare what you have installed with LinuxServer Heimdall 0 <2.7.3 0 <2.7.3. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 0.59%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Jul 27, 2025 · EUVD

    Detected

    LinuxServer.io Heimdall before 2.7.3 allows XSS via the q parameter.

  2. Jul 28, 2025 · EUVD

    Updated

    LinuxServer.io Heimdall before 2.7.3 allows XSS via the q parameter.

Sources

  • CVE.orgVulnerability recordCVE-2025-54597

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2025-54597

    30-day exploitation probability 0.59%

    first.org
  • EUVDVulnerability recordEUVD-2025-22806

    LinuxServer.io Heimdall before 2.7.3 allows XSS via the q parameter.

    euvd.enisa.europa.eu

References

Freshness

Last verified in this catalog Oct 23, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • FIRST EPSSOct 23, 2026
  • CVE.orgOct 21, 2026
  • EUVDOct 21, 2026