The website should generate links to reference issues
https://rustsec.org/advisories/RUSTSEC-2020-0071.html At the bottom of this page at the references section, it should possibly generate a link to that issue (which would be https://github.com/time-rs/time/issues/293).
Here the reference section is not generated by the website but part of the description (see https://raw.githubusercontent.com/rustsec/advisory-db/main/crates/time/RUSTSEC-2020-0071.md), so there is no meaningful way to automatically put a link here, it should be a markdown link in the source.
However the link to the issue is already part of the metadata (in the url field), so there is probably no need to repeat it in the description, and the section could be removed completely.
Closing as explained, the bug is in the advisory description (opened https://github.com/rustsec/advisory-db/pull/1393 to fix it).