CVE-2025-41255

Cyberduck and Mountain Duck improperly handle TLS certificate pinning for untrusted certificates (e.g., self-signed), unnecessarily installing it to the Windows Certificate Store of the current user without any restrictions.

This issue affects Cyberduck through 9.1.6 and Mountain Duck through 4.17.5.

Weakness

A product incorrectly assigns a privilege to a particular actor, creating an unintended sphere of control for that actor.

Potential Mitigations

References

• https://github.com/iterate-ch/cyberduck/security/advisories/GHSA-vjjc-grpp-m655
• https://github.com/sbaresearch/advisories/tree/public/2025/SBA-ADV-20250325-01_Cyberduck_Mountain_Duck_Certificate_Handling
• https://github.com/iterate-ch/cyberduck/security/advisories/GHSA-vjjc-grpp-m655
• https://github.com/sbaresearch/advisories/tree/public/2025/SBA-ADV-20250325-01_Cyberduck_Mountain_Duck_Certificate_Handling