Stored XSS due to Unrestricted File Upload in GitHub repository star7th/showdoc prior to v2.10.4.
https://github.com/advisories/GHSA-82j4-vr25-x394
https://huntr.dev/bounties/856bd2e2-db4f-4b7d-9927-222261ae3782
https://github.com/star7th/showdoc/commit/78522520892d4e29cc94148c6ec84a204a607b73