Lychee up to 6.6.9 SecurePathController.php path traversal

Summaryinfo

A vulnerability, which was classified as critical, has been found in Lychee up to 6.6.9. The impacted element is an unknown function of the file SecurePathController.php. The manipulation leads to path traversal. This vulnerability is listed as CVE-2025-50202. The attack may be initiated remotely. There is no available exploit. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in Lychee up to 6.6.9. It has been rated as critical. This issue affects an unknown functionality of the file SecurePathController.php. The manipulation with an unknown input leads to a path traversal vulnerability. Using CWE to declare the problem leads to CWE-22. The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. Impacted is confidentiality. The summary by CVE is:

Lychee is a free photo-management tool. In versions starting from 6.6.6 to before 6.6.10, an attacker can leak local files including environment variables, nginx logs, other user's uploaded images, and configuration secrets due to a path traversal exploit in SecurePathController.php. This issue has been patched in version 6.6.10.

It is possible to read the advisory at github.com. The identification of this vulnerability is CVE-2025-50202 since 06/13/2025. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1006 according to MITRE ATT&CK.

By approaching the search of inurl:SecurePathController.php it is possible to find vulnerable targets with Google Hacking.

Upgrading to version 6.6.10 eliminates this vulnerability. Applying the patch ae7270b7b47e4a284ea1f69d260e52d592711072 is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2025-18624). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Name

• Lychee

Version

• 6.6.0
• 6.6.1
• 6.6.2
• 6.6.3
• 6.6.4
• 6.6.5
• 6.6.6
• 6.6.7
• 6.6.8
• 6.6.9

License

• open-source

CPE 2.3info

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CPE 2.2info

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Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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