CVE-2023-51803

9.8 criticalEPSS 0.7%

Critical (9.8). EPSS 0.7% chance of exploitation in the next 30 days.

LinuxServer.io Heimdall before 2.5.7 does not prevent use of icons that have non-image data such as the "<?php ?>" substring.

Severity

9.8 critical

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS: 0.7% chance of exploitation in the next 30 days; higher than 53% of CVEs (scores of 2026-10-31)
CWE: CWE-674
Published: 2024-04-01
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19