Webtrees 2.1.18 is vulnerable to Directory Traversal. By manipulating the "media_folder" parameter in the URL, an attacker (in this case, an administrator) can navigate beyond the intended directory (the 'media/' directory) to access sensitive files in other parts of the application's file system.

References

• https://nvd.nist.gov/vuln/detail/CVE-2024-22723
• https://cupc4k3.medium.com/cve-2024-22723-webtrees-vulnerability-uncovering-sensitive-data-through-path-traversal-7442e7a38b68