In phpipam/phpipam version 1.5.1, the Secure attribute for sensitive cookies in HTTPS sessions is not set. This could cause the user agent to send those cookies in plaintext over an HTTP session, potentially exposing sensitive information. The issue is fixed in version 1.7.0.
https://huntr.com/bounties/725bce8f-328f-4fbc-acf5-46ea920cd3c1
https://github.com/phpipam/phpipam/commit/ddf70ef6801442eb8b0be5eea829e470e653c70e