TRUST_NO_PASSWORD_OVER_GET
A GET form puts the password in the query string, where it lands in browser history, server access logs, proxy logs and the Referer header sent to every third party on the next page.
Impact is importance multiplied by the confidence tier’s weight — SPECIFICATION 1.0, RESEARCH 0.7, EMERGING 0.3, EXPERIMENTAL 0.1. Two rules backed by the same class of evidence therefore always carry the same weight, which is what makes the score reproducible rather than hand-tuned.