Different ecosystems mint different ids for the same vulnerability. Paste a CVE, EUVD (ENISA EU Vulnerability Database), GHSA (GitHub Security Advisory), or GSD id and this tool resolves it to the canonical CVE and lists every cross-referenced alias, using the EUVD alias graph.
For example, EUVD-2021-34768 and GHSA-jfh8-c2jp-5v3q both resolve to CVE-2021-44228 (Log4Shell).