{"action":"Upgrade ssddanbrown/bookstack to 0.30.4 or later.","affected":[{"fixed":"0.30.4","introduced":"0"}],"component":"ssddanbrown/bookstack","cve_ids":["CVE-2020-26211"],"ecosystem":"Packagist","epss":0.01096,"exploited":false,"fixed_versions":["0.30.4"],"ghsa_id":"GHSA-ch37-ch8w-cfrq","id":"tcs_01M5KF0ZRKPHCSR35R2QZWPQVP","modified_at":"2026-09-10T03:49:22.170948833Z","published_at":"2022-05-24T17:32:59Z","references":["https://osv.dev/vulnerability/GHSA-ch37-ch8w-cfrq","https://github.com/BookStackApp/BookStack/security/advisories/GHSA-r2cf-8778-3jgp","https://nvd.nist.gov/vuln/detail/CVE-2020-26211","https://github.com/BookStackApp/BookStack/commit/bbd1384acbe7e52c21f89af69f2dc391c95dbf54","https://github.com/BookStackApp/BookStack","https://github.com/BookStackApp/BookStack/releases/tag/v0.30.4","https://www.bookstackapp.com/blog/beta-release-v0-30-4"],"severity":{"label":"high","score":8.7},"sources":[{"source":"osv","source_id":"GHSA-ch37-ch8w-cfrq","url":"https://osv.dev/vulnerability/GHSA-ch37-ch8w-cfrq"}],"summary":"Bookstack Cross-site Scripting vulnerability"}