What’s Vulnerable › Vulnerabilities

CVE-2023-51803

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.7% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2024-04-01 · updated 2026-06-17
• Weakness: CWE-674

Description

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

Affected products

• linuxserver Heimdall: before 2.5.7 — fixed in 2.5.7

How to fix

Upgrade to a fixed version: linuxserver Heimdall 2.5.7. Check the vendor advisory for mitigations.

References

• https://github.com/linuxserver/Heimdall/pull/1167
• https://github.com/linuxserver/Heimdall/pull/1173
• https://github.com/linuxserver/Heimdall/releases/tag/v2.5.7
• https://github.com/linuxserver/Heimdall/pull/1167
• https://github.com/linuxserver/Heimdall/pull/1173
• https://github.com/linuxserver/Heimdall/releases/tag/v2.5.7

Get alerted when CVE-2023-51803 or the next vulnerability affects your stack