It sounds like you're referring to a feature involving something like urllogpasstxt and a link — possibly related to extracting or handling URL/login/password data from a .txt file or similar.
$$https://example.com/log-entry?url=https://sensitive-data.com&pass=plaintextpassword$$ urllogpasstxt link
Could you provide more details about:
Such content is often associated with:
Though rare, specifically crafted files can exploit vulnerabilities in text readers or preview panes. Guide: Dealing with Potential Credential Leaks It sounds like you're referring to a feature